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The evolution of stars - Illustration - The evolution of stars - Illustration - All stars are born in interstellar clouds but according to their masses they will follow different destinies. From top to bottom: - The brown dwarf - The red dwarf, a small star that will become a white dwarf and then a black dwarf. - A star of the same type as the Sun, which will evolve into a red giant then planetary nebula to become a white dwarf and end up as a black dwarf. - A blue giant star that becomes supergeant red to explode in supernova and finish either black hole or neutron star. Every stars come to life in interstellar clouds, but their evolution will depend on their mass; from top to bottom: - A brown dwarf - A red dwarf, a small star which will slowly collapse to become a white dwarf then a black dwarf. - A Sun - like star will become a red giant then a planetary nebula, a white dwarf and will end as a black dwarf. - A blue star will become a red supergiant, then will explode in a supernova

The evolution of stars - Illustration - The evolution of stars - Illustration - All stars are born in interstellar clouds but according to their masses they will follow different destinies. From top to bottom: - The brown dwarf - The red dwarf, a small star that will become a white dwarf and then a black dwarf. - A star of the same type as the Sun, which will evolve into a red giant then planetary nebula to become a white dwarf and end up as a black dwarf. - A blue giant star that becomes supergeant red to explode in supernova and finish either black hole or neutron star. Every stars come to life in interstellar clouds, but their evolution will depend on their mass; from top to bottom: - A brown dwarf - A red dwarf, a small star which will slowly collapse to become a white dwarf then a black dwarf. - A Sun - like star will become a red giant then a planetary nebula, a white dwarf and will end as a black dwarf. - A blue star will become a red supergiant, then will explode in a supernova

PIX4573087

Hertzsprung - Russell - The Hertzsprung - Russell diagram - Hertzsprung - Russell (HR) diagram displaying stars according to their surface temperature and luminosite. The Hertzsprung - Russell diagram is named after the Danish astronomer Einar Hertzsprung (1873 - 1967) and the American astronomer Henry Norris Russell (1877 - 1957). At the beginning of the 20th century they independently noticed that red stars come in very different sizes, pioneering subsequent studies of stellar parameters (e.g., temperature, size and mass). In its basic version, this diagram plots stellar temperature (or colour) against brightness (or magnitude) and is therefore also referred to as the “” colour - magnitude diagram””. The position of a particular star in the diagram also provides information about its evolutionary stage (and age)

Hertzsprung - Russell - The Hertzsprung - Russell diagram - Hertzsprung - Russell (HR) diagram displaying stars according to their surface temperature and luminosite. The Hertzsprung - Russell diagram is named after the Danish astronomer Einar Hertzsprung (1873 - 1967) and the American astronomer Henry Norris Russell (1877 - 1957). At the beginning of the 20th century they independently noticed that red stars come in very different sizes, pioneering subsequent studies of stellar parameters (e.g., temperature, size and mass). In its basic version, this diagram plots stellar temperature (or colour) against brightness (or magnitude) and is therefore also referred to as the “” colour - magnitude diagram””. The position of a particular star in the diagram also provides information about its evolutionary stage (and age)

P. Carril

PIX4573012

Hertzsprung - Russell - The Hertzsprung - Russell diagram - HR diagram (Hertzsprung - Russell) displaying stars according to their surface temperature and luminosite. The Hertzsprung - Russell diagram is named after the Danish astronomer Einar Hertzsprung (1873 - 1967) and the American astronomer Henry Norris Russell (1877 - 1957). At the beginning of the 20th century they independently noticed that red stars come in very different sizes, pioneering subsequent studies of stellar parameters (e.g., temperature, size and mass). In its basic version, this diagram plots stellar temperature (or colour) against brightness (or magnitude) and is therefore also referred to as the “” colour - magnitude diagram””. The position of a particular star in the diagram also provides information about its evolutionary stage (and age)

Hertzsprung - Russell - The Hertzsprung - Russell diagram - HR diagram (Hertzsprung - Russell) displaying stars according to their surface temperature and luminosite. The Hertzsprung - Russell diagram is named after the Danish astronomer Einar Hertzsprung (1873 - 1967) and the American astronomer Henry Norris Russell (1877 - 1957). At the beginning of the 20th century they independently noticed that red stars come in very different sizes, pioneering subsequent studies of stellar parameters (e.g., temperature, size and mass). In its basic version, this diagram plots stellar temperature (or colour) against brightness (or magnitude) and is therefore also referred to as the “” colour - magnitude diagram””. The position of a particular star in the diagram also provides information about its evolutionary stage (and age)

P. Carril

PIX4572996

Artist's view of an eruptive star - Flare star - Artwork: DG Canum Venaticorum (DG CVN) is a binary star located in the constellation Hunting Dogs. On 23 April 2014, a powerful gamma eruption from this system was recorded by the Swift satellite. DG Canum Venaticorum (DG CVN) is a binary star system in the northern constellation of Canes Venatici. On 2014 April 23, 2014, a gamma-ray superflare event was observed by the Swift satellite coming from the position of this system. It may have been perhaps the most luminous such events ever observed coming from a red dwarf star

Artist's view of an eruptive star - Flare star - Artwork: DG Canum Venaticorum (DG CVN) is a binary star located in the constellation Hunting Dogs. On 23 April 2014, a powerful gamma eruption from this system was recorded by the Swift satellite. DG Canum Venaticorum (DG CVN) is a binary star system in the northern constellation of Canes Venatici. On 2014 April 23, 2014, a gamma-ray superflare event was observed by the Swift satellite coming from the position of this system. It may have been perhaps the most luminous such events ever observed coming from a red dwarf star

PIX4572752

Barnard's Star Movement - The proper motion of Barnard's star - Barnard's Star is a red dwarf less than six years from Earth in the constellation Ophiuchus. Its proximity makes it move quickly ahead of the other stars. Barnard's star is known for having the most important clean movement. This composite image made from three images taken in 1988 (blue), 1991 (red) and 1993 (green) shows the shift of the star in 15 years. Barnard's Star is red dwarf star approximately 6 light - years away from Earth in the constellation of Ophiuchus Its proper motion is 10.3 arcseconds per year, which remains the largest known proper motion of any star relative to the Sun. The monochrome plates from which this 3 - colour picture were made were taken in 1988 (blue), 1991 (red) and 1993 (green) showing its movement over 15 years

Barnard's Star Movement - The proper motion of Barnard's star - Barnard's Star is a red dwarf less than six years from Earth in the constellation Ophiuchus. Its proximity makes it move quickly ahead of the other stars. Barnard's star is known for having the most important clean movement. This composite image made from three images taken in 1988 (blue), 1991 (red) and 1993 (green) shows the shift of the star in 15 years. Barnard's Star is red dwarf star approximately 6 light - years away from Earth in the constellation of Ophiuchus Its proper motion is 10.3 arcseconds per year, which remains the largest known proper motion of any star relative to the Sun. The monochrome plates from which this 3 - colour picture were made were taken in 1988 (blue), 1991 (red) and 1993 (green) showing its movement over 15 years

PIX4571864

The evolution of the Sun - Illustration - The evolution of the Sun - Illustration - Artist's view of the evolution of a yellow star, such as the Sun

The evolution of the Sun - Illustration - The evolution of the Sun - Illustration - Artist's view of the evolution of a yellow star, such as the Sun

P. Carril

PIX4573041

The evolution of the Sun - Illustration - The evolution of the Sun - Illustration - Artist's view of the evolution of a yellow star like the Solei

The evolution of the Sun - Illustration - The evolution of the Sun - Illustration - Artist's view of the evolution of a yellow star like the Solei

P. Carril

PIX4573035

Nebula around the star R Aquarii - R Aquarii and its peculiar nebula - This star is actually a binary system composed of a giant red star (in the center) and a white dwarf (invisible in this photo). Image obtained by Siding Spring's 3.9m telescope. The star at the centre of this unique nebula has been known to be variable since 1810. It has a period of a little over a year, but the brightness shifts are erratic, ranging from the threshold of naked eye visibility to about 200 times fainter. At the centre of the nebula is a symbiotic star, an interacting pair consisting of a red giant and white dwarf. The dwarf draws in material from the giant, occasionally ejecting the surplus as the strange loops seen in the colour picture. The white dwarf itself is invisible and the light from the red dwarf is truly red, perhaps because the whole system is embedded in very dusty nebula which absorbs what blue light there is

Nebula around the star R Aquarii - R Aquarii and its peculiar nebula - This star is actually a binary system composed of a giant red star (in the center) and a white dwarf (invisible in this photo). Image obtained by Siding Spring's 3.9m telescope. The star at the centre of this unique nebula has been known to be variable since 1810. It has a period of a little over a year, but the brightness shifts are erratic, ranging from the threshold of naked eye visibility to about 200 times fainter. At the centre of the nebula is a symbiotic star, an interacting pair consisting of a red giant and white dwarf. The dwarf draws in material from the giant, occasionally ejecting the surplus as the strange loops seen in the colour picture. The white dwarf itself is invisible and the light from the red dwarf is truly red, perhaps because the whole system is embedded in very dusty nebula which absorbs what blue light there is

PIX4571946

Nova de l'Eagle - Nova Aquilae. Artwork - Artist's view of a nova, a white dwarf star that attracts the material of a companion star at the end of life, a red giant, and compresses these gases and then unleash a nuclear fusion reaction releasing a huge amount of energy in the form of a brief, extremely bright light. Here the artist showed the binary system just before the explosion of the nova. The artist's illustration depicts a classical nova binary system just before an explosion on the surface of the white dwarf. Classical novas occur in a system where a white dwarf closely orbits a normal, companion star. In this illustration, gas is flowing from the large red, companion star into a disk and then onto the white dwarf that is hidden inside the white area. As the gas flows ever closer to the white dwarf, it gets increasingly hotter, as indicated by the change in colors from yellow to white. When the explosion occurs, it engulfs the disk of gas and the red companion star

Nova de l'Eagle - Nova Aquilae. Artwork - Artist's view of a nova, a white dwarf star that attracts the material of a companion star at the end of life, a red giant, and compresses these gases and then unleash a nuclear fusion reaction releasing a huge amount of energy in the form of a brief, extremely bright light. Here the artist showed the binary system just before the explosion of the nova. The artist's illustration depicts a classical nova binary system just before an explosion on the surface of the white dwarf. Classical novas occur in a system where a white dwarf closely orbits a normal, companion star. In this illustration, gas is flowing from the large red, companion star into a disk and then onto the white dwarf that is hidden inside the white area. As the gas flows ever closer to the white dwarf, it gets increasingly hotter, as indicated by the change in colors from yellow to white. When the explosion occurs, it engulfs the disk of gas and the red companion star

PIX4572591

Artist's view of a binary star - Binary star. Artwor

Artist's view of a binary star - Binary star. Artwor

S. Numazawa

PIX4572606

The evolution of stars - Illustration - The evolution of the stars - Illustration - All stars are born in interstellar clouds but according to their masses they will follow different destinies

The evolution of stars - Illustration - The evolution of the stars - Illustration - All stars are born in interstellar clouds but according to their masses they will follow different destinies

P. Carril

PIX4573016

Proxima Star of Centauri - Proxima Centauri - Proxima of Centaur (in the center of the image) is the closest star to the Sun, at a distance of 4.2 years - light. Image obtained from the 1.2m Schmidt UK telescope of Siding Spring. Proxima Centauri is the nearest known star to the sun, at a distance of about 4.2 light years. It is an intrinsically faint red star, more than ten magnitudes (ten thousand times) fainter than the Sun. It is also much cooler, with a surface temperature of about 3100 C. Its visual (apparent) magnitude is eleven, so it is only visible with a good telescope, and only then from southern latitudes. Proxima is about one - tenth the mass of the sun, which accounts for its low surface temperature. It is possibly an outlying member of the triple alpha Centauri system just a few light days closer to us than the other, much brighter stars in the group

Proxima Star of Centauri - Proxima Centauri - Proxima of Centaur (in the center of the image) is the closest star to the Sun, at a distance of 4.2 years - light. Image obtained from the 1.2m Schmidt UK telescope of Siding Spring. Proxima Centauri is the nearest known star to the sun, at a distance of about 4.2 light years. It is an intrinsically faint red star, more than ten magnitudes (ten thousand times) fainter than the Sun. It is also much cooler, with a surface temperature of about 3100 C. Its visual (apparent) magnitude is eleven, so it is only visible with a good telescope, and only then from southern latitudes. Proxima is about one - tenth the mass of the sun, which accounts for its low surface temperature. It is possibly an outlying member of the triple alpha Centauri system just a few light days closer to us than the other, much brighter stars in the group

PIX4571821

Red Dwarf Star Proxima of Centauri - Proxima Centauri in X - Ray - Proxima of Centaur (in the center of the image) is the closest star to the Sun, at a distance of 4.2 years - light. It belongs to the triple Alpha star system of the Centaurus being the least bright star of this system; it is a red dwarf star. X-ray image obtained by the Chandra space telescope. Chandra and XMM - Newton observations of the red dwarf star Proxima Centauri have shown that its surface is in a state of turmoil. Flares, or explosive outbursts, occur almost continually. This behavior can be traced to Proxima Centauri's low mass, about a tenth that of the Sun. In the cores of low mass stars, nuclear fusion reactions that convert hydrogen to helium proceed very slowly, and create a turbulent, convective motion throughout their interiors. This motion stores up magnetic energy which is often released explosively in the star's upper atmosphere where it produces flares in X - rays and other forms of light. The same

Red Dwarf Star Proxima of Centauri - Proxima Centauri in X - Ray - Proxima of Centaur (in the center of the image) is the closest star to the Sun, at a distance of 4.2 years - light. It belongs to the triple Alpha star system of the Centaurus being the least bright star of this system; it is a red dwarf star. X-ray image obtained by the Chandra space telescope. Chandra and XMM - Newton observations of the red dwarf star Proxima Centauri have shown that its surface is in a state of turmoil. Flares, or explosive outbursts, occur almost continually. This behavior can be traced to Proxima Centauri's low mass, about a tenth that of the Sun. In the cores of low mass stars, nuclear fusion reactions that convert hydrogen to helium proceed very slowly, and create a turbulent, convective motion throughout their interiors. This motion stores up magnetic energy which is often released explosively in the star's upper atmosphere where it produces flares in X - rays and other forms of light. The same

PIX4571790

Open cluster NGC 7789 in Cassiopee - Open cluster NGC 7789 in Cassiopeia - The cluster of stars NGC 7789 is located about 7600 years - light from Earth. It contains about 300 stars, including a number of giant red stars. His age is estimated at 1.6 billion years. The open cluster NGC 7789 in Cassiopeia is a bright and richly populated cluster comprised of approximately 300 member stars which are evenly distributed and well detached from the background sky. This cluster lies at a distance of 7620 light - years away with an apparent diameter of 25 '. As indicated by the various red giants in the image, the cluster is advanced in age and which has been estimated to be approximately 1.6 billion years - old

Open cluster NGC 7789 in Cassiopee - Open cluster NGC 7789 in Cassiopeia - The cluster of stars NGC 7789 is located about 7600 years - light from Earth. It contains about 300 stars, including a number of giant red stars. His age is estimated at 1.6 billion years. The open cluster NGC 7789 in Cassiopeia is a bright and richly populated cluster comprised of approximately 300 member stars which are evenly distributed and well detached from the background sky. This cluster lies at a distance of 7620 light - years away with an apparent diameter of 25 '. As indicated by the various red giants in the image, the cluster is advanced in age and which has been estimated to be approximately 1.6 billion years - old

R. Gendler

PIX4568671

Star Antares in Scorpio - Star Antares in Scorpius - Supergeant star - On its left the globular cluster M4. To its left, the globular cluster M4

Star Antares in Scorpio - Star Antares in Scorpius - Supergeant star - On its left the globular cluster M4. To its left, the globular cluster M4

Serge Brunier

PIX4571699

Artist's view of a dwarf nova - Dwarf nova. Artwork - Artist's view of a nova, a white dwarf star that attracts the material of a companion star at the end of life, a red giant, and compresses these gases and then releases a nuclear fusion reaction releasing a huge amount of energy in the form of a brief, extremely bright light. A dwarf nova is characterised by smaller eruptions

Artist's view of a dwarf nova - Dwarf nova. Artwork - Artist's view of a nova, a white dwarf star that attracts the material of a companion star at the end of life, a red giant, and compresses these gases and then releases a nuclear fusion reaction releasing a huge amount of energy in the form of a brief, extremely bright light. A dwarf nova is characterised by smaller eruptions

S. Numazawa

PIX4572580

Motion of the Star Proxima of Centauri - The proper motion of Proxima Centauri - Proxima of Centauri (in the center of the image) is the closest star to the Sun, located at a distance of 4.2 years - light. This star is a red dwarf, 10,000 times less luminous than our Sun, and is invisible to the naked eye. Its proximity makes it move quickly ahead of the other stars. This composite image made from three images taken in 1976 (blue), 1982 (red) and 1993 (green) shows the shift of the star in 17 years. Image obtained from the 1.2m Schmidt UK telescope of Siding Spring. Proxima Centauri is the nearest known star to the sun, at a distance of about 4.2 light years. It is an intrinsically faint red star, more than ten magnitudes (ten thousand times) fainter than the Sun. It is also much cooler, with a surface temperature of about 3100 C. Its visual (apparent) magnitude is eleven, so it is only visible with a good telescope, and only then from southern latitudes. Proxima is about one - tenth t

Motion of the Star Proxima of Centauri - The proper motion of Proxima Centauri - Proxima of Centauri (in the center of the image) is the closest star to the Sun, located at a distance of 4.2 years - light. This star is a red dwarf, 10,000 times less luminous than our Sun, and is invisible to the naked eye. Its proximity makes it move quickly ahead of the other stars. This composite image made from three images taken in 1976 (blue), 1982 (red) and 1993 (green) shows the shift of the star in 17 years. Image obtained from the 1.2m Schmidt UK telescope of Siding Spring. Proxima Centauri is the nearest known star to the sun, at a distance of about 4.2 light years. It is an intrinsically faint red star, more than ten magnitudes (ten thousand times) fainter than the Sun. It is also much cooler, with a surface temperature of about 3100 C. Its visual (apparent) magnitude is eleven, so it is only visible with a good telescope, and only then from southern latitudes. Proxima is about one - tenth t

PIX4571842

August 24, 2016: The three stars that make up the Centaur Alpha system are the closest stars to the Sun. Proxima du Centaur is located at a distance of 4.22 light years from the Sun but is invisible to the naked eye. Alpha Centauri A and B are a little further away, 4.36 light years from the Sun. These two stars are relatively similar to the Sun. Although Proxima of Centauri is distant from the Alpha couple of Centauri, its movement seems to link it to this system and is sometimes called Alpha Centauri C - This image of the sky around the bright star Alpha Centauri AB also shows the much fainter red dwarf star, Proxima Centauri, the closest star to the Solar System. The picture was created from pictures forming part of the Digitized Sky Survey 2. The blue halo around Alpha Centauri AB is an artifact of the photographic process, the star is really pale yellow in colour like the Sun

August 24, 2016: The three stars that make up the Centaur Alpha system are the closest stars to the Sun. Proxima du Centaur is located at a distance of 4.22 light years from the Sun but is invisible to the naked eye. Alpha Centauri A and B are a little further away, 4.36 light years from the Sun. These two stars are relatively similar to the Sun. Although Proxima of Centauri is distant from the Alpha couple of Centauri, its movement seems to link it to this system and is sometimes called Alpha Centauri C - This image of the sky around the bright star Alpha Centauri AB also shows the much fainter red dwarf star, Proxima Centauri, the closest star to the Solar System. The picture was created from pictures forming part of the Digitized Sky Survey 2. The blue halo around Alpha Centauri AB is an artifact of the photographic process, the star is really pale yellow in colour like the Sun

PIX4650930

Exoplanete around a binary star - Artist view - Binary Red Giants Exoplanet - Artist rendering

Exoplanete around a binary star - Artist view - Binary Red Giants Exoplanet - Artist rendering

Miller, Ron (b.1947)

PIX4573130

Artist's view of a red dwarf star - A red dwarf. Artwor

Artist's view of a red dwarf star - A red dwarf. Artwor

S. Numazawa

PIX4572395

The three stars that make up the Centaur Alpha System are the closest stars to the Sun. The image on the left shows the double alpha star of the Centauri (Alpha Centauri A and B) overexposed to the red dwarf star Proxima of the Centaurus (indicated by the arrow). Proxima du Centaur is located at a distance of 4.22 years - light from the Sun but is invisible to the naked eye. Alpha Centauri A and B are a little further away, 4.36 years from the Sun. These two stars are relatively similar to the Sun. Although Proxima of Centauri is distant from the Alpha couple of Centauri, its movement seems to link it to this system and is sometimes called Alpha Centauri C. Location of the Alpha Centauri triple stellar system in the sky. The brighter stars (Alpha Centauri A and B) are strongly overexposed, with the outlying member, Proxima lying approx. 2.2* to the south - west (arrow). Smaller areas around the stars are shown in the inserts to the right. The photo has been reproduced from a blue - sen

The three stars that make up the Centaur Alpha System are the closest stars to the Sun. The image on the left shows the double alpha star of the Centauri (Alpha Centauri A and B) overexposed to the red dwarf star Proxima of the Centaurus (indicated by the arrow). Proxima du Centaur is located at a distance of 4.22 years - light from the Sun but is invisible to the naked eye. Alpha Centauri A and B are a little further away, 4.36 years from the Sun. These two stars are relatively similar to the Sun. Although Proxima of Centauri is distant from the Alpha couple of Centauri, its movement seems to link it to this system and is sometimes called Alpha Centauri C. Location of the Alpha Centauri triple stellar system in the sky. The brighter stars (Alpha Centauri A and B) are strongly overexposed, with the outlying member, Proxima lying approx. 2.2* to the south - west (arrow). Smaller areas around the stars are shown in the inserts to the right. The photo has been reproduced from a blue - sen

PIX4571830

Star Antares in the Scorpion - The nebula around Antares - Supergeant star Antares seen at the 3.9m telescope of Siding Spring. To his right is the globular cluster NGC 6144. Antares is a giant among stars, and like giants in general, very rare. Antares has spent most of its short life as a highly luminous blue supergiant star, its mass obliging it to consume its vast store of nuclear fuel (hydrogen) very rapidly. This nuclear fusion process supplied the energy that prevented the star collapsing in on itself - - all stars support themselves against gravity in this way. Now, the supply of fuel in the core of the star is close to exhaustion and the star has undergone a major internal re - arrangement to cope with the changed circumstances, both cooling and swelling in the process. This star is big; the earth would be inside it if it were to replace the sun. At its cool, distended surface, tiny solid particles begin to appear, made of the heavier trace elements formed with in the star. Th

Star Antares in the Scorpion - The nebula around Antares - Supergeant star Antares seen at the 3.9m telescope of Siding Spring. To his right is the globular cluster NGC 6144. Antares is a giant among stars, and like giants in general, very rare. Antares has spent most of its short life as a highly luminous blue supergiant star, its mass obliging it to consume its vast store of nuclear fuel (hydrogen) very rapidly. This nuclear fusion process supplied the energy that prevented the star collapsing in on itself - - all stars support themselves against gravity in this way. Now, the supply of fuel in the core of the star is close to exhaustion and the star has undergone a major internal re - arrangement to cope with the changed circumstances, both cooling and swelling in the process. This star is big; the earth would be inside it if it were to replace the sun. At its cool, distended surface, tiny solid particles begin to appear, made of the heavier trace elements formed with in the star. Th

PIX4571707

Open cluster NGC 4755 - Jewel box - The Jewel Box cluster - The NGC 4755 cluster is located in the constellation of the Southern Cross at a distance of 7800 years - light from Earth. The bright orange star is Kappa Crucis, a supergiant red star. This cluster contains about fifty stars formed about 14 million years ago. NGC4755 (Caldwell 94) is called the Jewel Box, based on John Herschel's comment in the 1830's that it looked like a superb piece of jewelry. There are about 50 stars in this cluster which formed some 14 million years ago. Most of the cluster members are blue giants which in a few million years will exhaust their hydrogen fuel and become red giants on their way to a cataclysmic end as supernovae. One red giant can already be seen at the center of the cluster

Open cluster NGC 4755 - Jewel box - The Jewel Box cluster - The NGC 4755 cluster is located in the constellation of the Southern Cross at a distance of 7800 years - light from Earth. The bright orange star is Kappa Crucis, a supergiant red star. This cluster contains about fifty stars formed about 14 million years ago. NGC4755 (Caldwell 94) is called the Jewel Box, based on John Herschel's comment in the 1830's that it looked like a superb piece of jewelry. There are about 50 stars in this cluster which formed some 14 million years ago. Most of the cluster members are blue giants which in a few million years will exhaust their hydrogen fuel and become red giants on their way to a cataclysmic end as supernovae. One red giant can already be seen at the center of the cluster

R. Gendler

PIX4568254

Comparison of the sizes of the Sun, Rigel, Betelgeuse and Antares - Size comparison: Sun, Rigel, Betelgeuse and Antares - The Sun (small dot on the right), and the blue supergiant star Rigel, are here compared to the supergiant red stars Betelgeuse (left), and Antares (in the background). The Sun (little dot at right) and Rigel are dwarfed by the red supergiants Betelgeuse (at left) and Antares (in background). Antares (alpha Scorpii) is the brightest star in the constellation Scorpius

Comparison of the sizes of the Sun, Rigel, Betelgeuse and Antares - Size comparison: Sun, Rigel, Betelgeuse and Antares - The Sun (small dot on the right), and the blue supergiant star Rigel, are here compared to the supergiant red stars Betelgeuse (left), and Antares (in the background). The Sun (little dot at right) and Rigel are dwarfed by the red supergiants Betelgeuse (at left) and Antares (in background). Antares (alpha Scorpii) is the brightest star in the constellation Scorpius

M. Carroll

PIX4571710

Hyad cluster - Mel 25 - The Hyades cluster in Taurus - Mel 25, the Hyades, is an open cluster visible to the naked eye in the constellation Taurus. The red giant star Aldebaran is the brightest star in the image. On the left, the small open cluster NGC 1647. The Hyades is a beautiful open cluster in Taurus that is easily visible to the unaided - eye. Brilliant Aldebaran, a 0.9 magnitude red giant star, dominates the cluster which is located about 153 light years away. Smaller open cluster NGC 1647 is on the left in the image, some 45 acr minutes in diameter at magnitude 6.4. This skyview is corresponding to binoculars and small telescopes

Hyad cluster - Mel 25 - The Hyades cluster in Taurus - Mel 25, the Hyades, is an open cluster visible to the naked eye in the constellation Taurus. The red giant star Aldebaran is the brightest star in the image. On the left, the small open cluster NGC 1647. The Hyades is a beautiful open cluster in Taurus that is easily visible to the unaided - eye. Brilliant Aldebaran, a 0.9 magnitude red giant star, dominates the cluster which is located about 153 light years away. Smaller open cluster NGC 1647 is on the left in the image, some 45 acr minutes in diameter at magnitude 6.4. This skyview is corresponding to binoculars and small telescopes

PIX4568962

Variable star Mira Ceti view in ultraviolet - Star Mira Ceti seen in ultraviolet - Ultraviolet view of the star Mira of the Whale revealing a long train of material ejected by the large red star. This trail extends over 13 years - light. Mosaic of images obtained by the Galex satellite in November and December 2006. Ultraviolet image of the star Mira taken with the Galex satellite in November and December 2006. In this image, Mira is moving from left to right. It is visible as the small white dot in the bulb shape at right. The shed material can be seen in light blue. The dots in the picture are stars and distant galaxies. The large blue dot at left is a star that is closer to us than Mira. Mira is traveling so fast (130 kilometers per second) that it's creating a bow shock, or build - up of gas, in front of it, as can be seen here at right

Variable star Mira Ceti view in ultraviolet - Star Mira Ceti seen in ultraviolet - Ultraviolet view of the star Mira of the Whale revealing a long train of material ejected by the large red star. This trail extends over 13 years - light. Mosaic of images obtained by the Galex satellite in November and December 2006. Ultraviolet image of the star Mira taken with the Galex satellite in November and December 2006. In this image, Mira is moving from left to right. It is visible as the small white dot in the bulb shape at right. The shed material can be seen in light blue. The dots in the picture are stars and distant galaxies. The large blue dot at left is a star that is closer to us than Mira. Mira is traveling so fast (130 kilometers per second) that it's creating a bow shock, or build - up of gas, in front of it, as can be seen here at right

PIX4572330

Hyad cluster - Mel 25 - The Hyades cluster in Taurus - Mel 25, the Hyades, is an open cluster visible to the naked eye in the constellation Taurus. The red giant star Aldebaran is the brightest star in the image. On the left, the small open cluster NGC 1647. The Hyades is a beautiful open cluster in Taurus that is easily visible to the unaided - eye. Brilliant Aldeberan, a 0.9 magnitude red giant star, dominates the cluster which is located about 153 light years away. Smaller open cluster NGC 1647 is on the left in the image, some 45 acr minutes in diameter at magnitude 6.4

Hyad cluster - Mel 25 - The Hyades cluster in Taurus - Mel 25, the Hyades, is an open cluster visible to the naked eye in the constellation Taurus. The red giant star Aldebaran is the brightest star in the image. On the left, the small open cluster NGC 1647. The Hyades is a beautiful open cluster in Taurus that is easily visible to the unaided - eye. Brilliant Aldeberan, a 0.9 magnitude red giant star, dominates the cluster which is located about 153 light years away. Smaller open cluster NGC 1647 is on the left in the image, some 45 acr minutes in diameter at magnitude 6.4

Jerry Lodriguss

PIX4568911

Hyades and Pleiades open clusters - Hyades and Pleiades open clusters - The Hyades cluster, on the left, with the brilliant star Aldebaran. On the right, the Pleiades cluster. These two clusters belong to the constellation of the Taurus of which Aldebaran is the brightest star; it is a red giante. The Hyades is seen at left, containing the bright star Aldeberan. The Pleiades is at right. Both are open clusters in the constellation of Tauru

Hyades and Pleiades open clusters - Hyades and Pleiades open clusters - The Hyades cluster, on the left, with the brilliant star Aldebaran. On the right, the Pleiades cluster. These two clusters belong to the constellation of the Taurus of which Aldebaran is the brightest star; it is a red giante. The Hyades is seen at left, containing the bright star Aldeberan. The Pleiades is at right. Both are open clusters in the constellation of Tauru

Jerry Lodriguss

PIX4568751

Hyades and Pleiades open clusters - Hyades and Pleiades open clusters - The Hyades cluster, on the left, with the brilliant star Aldebaran. On the right, the Pleiades cluster. These two clusters belong to the constellation of the Taurus of which Aldebaran is the brightest star; it is a red giante. The Pleiades is a relatively nearby open cluster, which according to new data from the Hipparcos satellite is located at a distance of 370 light years. The Hyades (at left) is another open cluster located even closer at a distance of 153 light years

Hyades and Pleiades open clusters - Hyades and Pleiades open clusters - The Hyades cluster, on the left, with the brilliant star Aldebaran. On the right, the Pleiades cluster. These two clusters belong to the constellation of the Taurus of which Aldebaran is the brightest star; it is a red giante. The Pleiades is a relatively nearby open cluster, which according to new data from the Hipparcos satellite is located at a distance of 370 light years. The Hyades (at left) is another open cluster located even closer at a distance of 153 light years

Jerry Lodriguss

PIX4568744

Comparison of Sun and Betelgeuse sizes - Size comparison: Betelgeuse and Sun - Betelgeuse star is a supergeant red star in the constellation Orion. It's one of the biggest stars known. It appears on this illustration at the scale next to the Sun (at the top). Betelgeuse is a red giant, one of the largest stars known. It forms the left shoulder of the constellation Orion. If Betelgeuse was placed at the center of our solar system, its fuzzy edge would extent out well beyond the orbit of Mars

Comparison of Sun and Betelgeuse sizes - Size comparison: Betelgeuse and Sun - Betelgeuse star is a supergeant red star in the constellation Orion. It's one of the biggest stars known. It appears on this illustration at the scale next to the Sun (at the top). Betelgeuse is a red giant, one of the largest stars known. It forms the left shoulder of the constellation Orion. If Betelgeuse was placed at the center of our solar system, its fuzzy edge would extent out well beyond the orbit of Mars

M. Carroll

PIX4571774

Hyad cluster - Mel 25 - The Hyades cluster in Taurus - Mel 25, the Hyades, is an open cluster visible to the naked eye in the constellation Taurus. The red giant star Aldebaran is the brightest star in the image. On the left, the small open cluster NGC 1647. The Hyades is a beautiful open cluster in Taurus that is easily visible to the unaided - eye. Brilliant Aldeberan, a 0.9 magnitude red giant star, dominates the cluster which is located about 153 light years away. Smaller open cluster NGC 1647 is on the left in the image, some 45 acr minutes in diameter at magnitude 6.4

Hyad cluster - Mel 25 - The Hyades cluster in Taurus - Mel 25, the Hyades, is an open cluster visible to the naked eye in the constellation Taurus. The red giant star Aldebaran is the brightest star in the image. On the left, the small open cluster NGC 1647. The Hyades is a beautiful open cluster in Taurus that is easily visible to the unaided - eye. Brilliant Aldeberan, a 0.9 magnitude red giant star, dominates the cluster which is located about 153 light years away. Smaller open cluster NGC 1647 is on the left in the image, some 45 acr minutes in diameter at magnitude 6.4

Jerry Lodriguss

PIX4568904

Antares star and globular clusters in the Scorpion - The nebula around Antares and globular clusters - Supergeante star Antares seen at the 3.9m telescope from Siding Spring. At the top right is the globular cluster NGC 6144, at the extreme right, cluster M4. Antares is a giant among stars, and like giants in general, very rare. Antares has spent most of its short life as a highly luminous blue supergiant star, its mass obliging it to consume its vast store of nuclear fuel (hydrogen) very rapidly. This nuclear fusion process supplied the energy that prevented the star collapsing in on itself - - all stars support themselves against gravity in this way. Now, the supply of fuel in the core of the star is close to exhaustion and the star has undergone a major internal re - arrangement to cope with the changed circumstances, both cooling and swelling in the process. This star is big; the earth would be inside it if it were to replace the sun. At its cool, distended surface, tiny solid part

Antares star and globular clusters in the Scorpion - The nebula around Antares and globular clusters - Supergeante star Antares seen at the 3.9m telescope from Siding Spring. At the top right is the globular cluster NGC 6144, at the extreme right, cluster M4. Antares is a giant among stars, and like giants in general, very rare. Antares has spent most of its short life as a highly luminous blue supergiant star, its mass obliging it to consume its vast store of nuclear fuel (hydrogen) very rapidly. This nuclear fusion process supplied the energy that prevented the star collapsing in on itself - - all stars support themselves against gravity in this way. Now, the supply of fuel in the core of the star is close to exhaustion and the star has undergone a major internal re - arrangement to cope with the changed circumstances, both cooling and swelling in the process. This star is big; the earth would be inside it if it were to replace the sun. At its cool, distended surface, tiny solid part

PIX4571773

Open cluster NGC 4755 - Jewel Box - The Jewel Box star cluster - The NGC 4755 cluster is located in the constellation of the Southern Cross at a distance of 6400 years - light from Earth. The bright orange star on the top right is Kappa Crucis, a supergiant red star. This cluster contains about fifty stars formed about 16 million years ago. This close-up of the center of the cluster was obtained with the Hubble Space Telescope. This image is a “” close - up 'view from the NASA/ESA Hubble Space Telescope of NGC 4755, or the Jewel Box cluster. Several very bright, pale blue supergiant stars, a solitary ruby - red supergiant and a variety of other brilliantly coloured stars are visible in the image, as well as many much fainter ones, often with intriguing colours. The huge variety in brightness exists because the brighter stars are 15 to 20 times the mass of the Sun, while the dimmest stars are less than half the mass of the Sun. This is the first image of an open galactic cluster with im

Open cluster NGC 4755 - Jewel Box - The Jewel Box star cluster - The NGC 4755 cluster is located in the constellation of the Southern Cross at a distance of 6400 years - light from Earth. The bright orange star on the top right is Kappa Crucis, a supergiant red star. This cluster contains about fifty stars formed about 16 million years ago. This close-up of the center of the cluster was obtained with the Hubble Space Telescope. This image is a “” close - up 'view from the NASA/ESA Hubble Space Telescope of NGC 4755, or the Jewel Box cluster. Several very bright, pale blue supergiant stars, a solitary ruby - red supergiant and a variety of other brilliantly coloured stars are visible in the image, as well as many much fainter ones, often with intriguing colours. The huge variety in brightness exists because the brighter stars are 15 to 20 times the mass of the Sun, while the dimmest stars are less than half the mass of the Sun. This is the first image of an open galactic cluster with im

PIX4568246

Starfield in Sagittarius/Swarms of Young and Older Stars Yield Clues to our Galaxy's Formation: Stars in Sagittarius seen by the Hubble space telescope. Aging red giant stars coexist with their more plentiful younger cousins, the smaller, white, Sun-like stars, in this crowded region of our galaxy's ancient central hub, or bulge. Most of the bright blue stars in the image are probably recently formed stars located in the foreground, in the galaxy's disk. The image is a composite of exposures taken in near-infrared and visible light with Hubble's Wide Field Camera 3

Starfield in Sagittarius/Swarms of Young and Older Stars Yield Clues to our Galaxy's Formation: Stars in Sagittarius seen by the Hubble space telescope. Aging red giant stars coexist with their more plentiful younger cousins, the smaller, white, Sun-like stars, in this crowded region of our galaxy's ancient central hub, or bulge. Most of the bright blue stars in the image are probably recently formed stars located in the foreground, in the galaxy's disk. The image is a composite of exposures taken in near-infrared and visible light with Hubble's Wide Field Camera 3

PIX4607530

Hyades and Pleiades open clusters - Hyades and Pleiades open clusters - The Hyades cluster, on the left, with the brilliant star Aldebaran. On the right, the Pleiades cluster. These two clusters belong to the constellation of the Taurus of which Aldebaran is the brightest star; it is a red giante. The Hyades is seen at left, containing the bright star Aldeberan. The Pleiades is at right. Both are open clusters in the constellation of Taurus. This skyview is corresponding to binoculars and small telescopes

Hyades and Pleiades open clusters - Hyades and Pleiades open clusters - The Hyades cluster, on the left, with the brilliant star Aldebaran. On the right, the Pleiades cluster. These two clusters belong to the constellation of the Taurus of which Aldebaran is the brightest star; it is a red giante. The Hyades is seen at left, containing the bright star Aldeberan. The Pleiades is at right. Both are open clusters in the constellation of Taurus. This skyview is corresponding to binoculars and small telescopes

PIX4568855

Hyades and Pleiades open clusters - Hyades and Pleiades open clusters - The Hyades cluster, bottom left, with the bright star Aldebaran. In the center, the Pleiades cluster. These two clusters belong to the constellation of the Taurus of which Aldebaran is the brightest star; it is a red giante. The Pleiades is a relatively nearby open cluster, which is located at a distance of 440 light years. The Hyades (at bottom left) is another open cluster located even closer at a distance of 153 light years

Hyades and Pleiades open clusters - Hyades and Pleiades open clusters - The Hyades cluster, bottom left, with the bright star Aldebaran. In the center, the Pleiades cluster. These two clusters belong to the constellation of the Taurus of which Aldebaran is the brightest star; it is a red giante. The Pleiades is a relatively nearby open cluster, which is located at a distance of 440 light years. The Hyades (at bottom left) is another open cluster located even closer at a distance of 153 light years

Vincent Toporenko

PIX4568749

Hyades and Pleiades open clusters - Hyades and Pleaides star clusters in Taurus - The Hyades cluster, on the left, with the brilliant star Aldebaran. On the right, the Pleiades cluster (M45). These two clusters belong to the constellation of the Taurus of which Aldebaran is the brightest star; it is a red giante. The Hyades is seen at left, containing the bright star Aldeberan. The Pleiades (M45) is at right. Both are open clusters in the constellation of Taurus

Hyades and Pleiades open clusters - Hyades and Pleaides star clusters in Taurus - The Hyades cluster, on the left, with the brilliant star Aldebaran. On the right, the Pleiades cluster (M45). These two clusters belong to the constellation of the Taurus of which Aldebaran is the brightest star; it is a red giante. The Hyades is seen at left, containing the bright star Aldeberan. The Pleiades (M45) is at right. Both are open clusters in the constellation of Taurus

Sebastian Voltmer

PIX4568946

Constellation of Taurus - Constellation of Taurus - Taurus, (the Bull) is one of the most ancient constellations, and appears in artefacts as old as western civilisation itself. The bull is still a figure of strength and fertility in cultures around the world. In the sky the distinctive 'V' shape of his head and long horns tipped by beta (ss) and zeta Tau is easily recognised. If the purpose of the horns was in doubt, the English name for ss Tau is Alnath, meaning 'the butting one'. The bull's glowing red eye of Aldebaran completes the picture, and its location between the delicate Pleiades and the aggressive stance of Orion makes Taurus hard to overlook. Despite its masculine connotations, the constellation is rich in female icons; both the Hyades and Pleiades star clusters are daughters of Atlas and both are important astronomically. The Pleiades (or the Seven Sisters) are a group of young stars at a distance of about 440 light years and on long exposure photographs are seen to be em

Constellation of Taurus - Constellation of Taurus - Taurus, (the Bull) is one of the most ancient constellations, and appears in artefacts as old as western civilisation itself. The bull is still a figure of strength and fertility in cultures around the world. In the sky the distinctive 'V' shape of his head and long horns tipped by beta (ss) and zeta Tau is easily recognised. If the purpose of the horns was in doubt, the English name for ss Tau is Alnath, meaning 'the butting one'. The bull's glowing red eye of Aldebaran completes the picture, and its location between the delicate Pleiades and the aggressive stance of Orion makes Taurus hard to overlook. Despite its masculine connotations, the constellation is rich in female icons; both the Hyades and Pleiades star clusters are daughters of Atlas and both are important astronomically. The Pleiades (or the Seven Sisters) are a group of young stars at a distance of about 440 light years and on long exposure photographs are seen to be em

PIX4594061

Artist's view of a nova recurrente - Recurrent nova. Artwork - Artist's view of a nova, a white dwarf star that attracts the material of a companion star at the end of life, a red giant, and compresses these gases and then releases a nuclear fusion reaction releasing a huge amount of energy in the form of a brief, extremely bright light. A nova recurrente is a star with at least two nova-type explosions

Artist's view of a nova recurrente - Recurrent nova. Artwork - Artist's view of a nova, a white dwarf star that attracts the material of a companion star at the end of life, a red giant, and compresses these gases and then releases a nuclear fusion reaction releasing a huge amount of energy in the form of a brief, extremely bright light. A nova recurrente is a star with at least two nova-type explosions

S. Numazawa

PIX4572573

Exoplanete BD+48 738c - Illustration of an extrasolar planet orbiting a red dwarf star. In the sky, close to the dwarf star, the giant red star BD+48 738. It's a large planet, which may be a small brown dwarf, that orbits a red dwarf star. According to one reference: “”... one of the massive, dying stars - - BD+48 738 - - is accompanied not only by an enormous, Jupiter - like planet, but also by a second, mystery object. According to the team, this object could be another planet, a low - mass star, or - - most interestingly - - a brown dwarf, which is a star - like body that is intermediate in mass between the coolest stars and giant planets.

Exoplanete BD+48 738c - Illustration of an extrasolar planet orbiting a red dwarf star. In the sky, close to the dwarf star, the giant red star BD+48 738. It's a large planet, which may be a small brown dwarf, that orbits a red dwarf star. According to one reference: “”... one of the massive, dying stars - - BD+48 738 - - is accompanied not only by an enormous, Jupiter - like planet, but also by a second, mystery object. According to the team, this object could be another planet, a low - mass star, or - - most interestingly - - a brown dwarf, which is a star - like body that is intermediate in mass between the coolest stars and giant planets.

Miller, Ron (b.1947)

PIX4574061

Star cluster in the nebula NGC 3603 - Star cluster in NGC 3603 nebula - Cluster of young stars in the nebula NGC 3603, located about 20,000 years ago - light from Earth in the southern constellation of Carene. Image obtained by the Hubble Space Telescope in August and December 2009. NGC 3603 is a prominent star - forming region located in the Carina spiral arm of the Milky Way, about 20,000 light - years away from our Solar System. This image from the NASA/ESA Hubble Space Telescope shows a young star cluster surrounded by a vast region of dust and gas. Most of the bright stars in the image are hot blue stars whose ultraviolet radiation and violent winds have blown out an enormous cavity in the gas and dust enveloping the cluster. This Hubble Space Telescope image was captured in August 2009 and December 2009 with the Wide Field Camera 3 in both visible and infrared light, which trace the glow of sulfur, hydrogen, and iron

Star cluster in the nebula NGC 3603 - Star cluster in NGC 3603 nebula - Cluster of young stars in the nebula NGC 3603, located about 20,000 years ago - light from Earth in the southern constellation of Carene. Image obtained by the Hubble Space Telescope in August and December 2009. NGC 3603 is a prominent star - forming region located in the Carina spiral arm of the Milky Way, about 20,000 light - years away from our Solar System. This image from the NASA/ESA Hubble Space Telescope shows a young star cluster surrounded by a vast region of dust and gas. Most of the bright stars in the image are hot blue stars whose ultraviolet radiation and violent winds have blown out an enormous cavity in the gas and dust enveloping the cluster. This Hubble Space Telescope image was captured in August 2009 and December 2009 with the Wide Field Camera 3 in both visible and infrared light, which trace the glow of sulfur, hydrogen, and iron

PIX4619158

August 24, 2016: The three stars that make up the Centaur Alpha system are the closest stars to the Sun. Proxima du Centaur is located at a distance of 4.22 light years from the Sun but is invisible to the naked eye. Alpha Centauri A and B are a little further away, 4.36 light years from the Sun. These two stars are relatively similar to the Sun. Although Proxima of Centauri is distant from the Alpha couple of Centauri, its movement seems to link it to this system and is sometimes called Alpha Centauri C - This image of the sky around the bright star Alpha Centauri AB also shows the much fainter red dwarf star, Proxima Centauri, the closest star to the Solar System. The picture was created from pictures forming part of the Digitized Sky Survey 2. The blue halo around Alpha Centauri AB is an artifact of the photographic process, the star is really pale yellow in colour like the Sun. Proxima Centauri appears as a faint red star towards the lower-right of the picture

August 24, 2016: The three stars that make up the Centaur Alpha system are the closest stars to the Sun. Proxima du Centaur is located at a distance of 4.22 light years from the Sun but is invisible to the naked eye. Alpha Centauri A and B are a little further away, 4.36 light years from the Sun. These two stars are relatively similar to the Sun. Although Proxima of Centauri is distant from the Alpha couple of Centauri, its movement seems to link it to this system and is sometimes called Alpha Centauri C - This image of the sky around the bright star Alpha Centauri AB also shows the much fainter red dwarf star, Proxima Centauri, the closest star to the Solar System. The picture was created from pictures forming part of the Digitized Sky Survey 2. The blue halo around Alpha Centauri AB is an artifact of the photographic process, the star is really pale yellow in colour like the Sun. Proxima Centauri appears as a faint red star towards the lower-right of the picture

PIX4650886

Exoplanete around Mira Ceti - Artist view - Mira Ceti seen from an exoplanet: The star Mira Ceti seen from the surface of an extrasolar planet - Mira is a binary star of the constellation of the Whale, consisting of a red giant, and a white dwarf - Mira Ceti is a binary stellar system, consisting of a variable red giant a white dwarf companion

Exoplanete around Mira Ceti - Artist view - Mira Ceti seen from an exoplanet: The star Mira Ceti seen from the surface of an extrasolar planet - Mira is a binary star of the constellation of the Whale, consisting of a red giant, and a white dwarf - Mira Ceti is a binary stellar system, consisting of a variable red giant a white dwarf companion

Miller, Ron (b.1947)

PIX4607535

Supernova 1993J exploding (artist's impression) - In 1993 the supernova SN 1993J appeared in the galaxy M81. The illustration shows the supergiant red star exploding after transferring a huge mass of hydrogen to its companion star (right). In this artist's view the red supergiant supernova progenitor star (left) is exploding after having transferred about 10 solar masses of hydrogen gas to the blue companion star (right). This interaction process happened over about 250 years and affected the supernova explosion to such an extent that SN 1993J was later known as one of the most peculiar supernovae ever seen

Supernova 1993J exploding (artist's impression) - In 1993 the supernova SN 1993J appeared in the galaxy M81. The illustration shows the supergiant red star exploding after transferring a huge mass of hydrogen to its companion star (right). In this artist's view the red supergiant supernova progenitor star (left) is exploding after having transferred about 10 solar masses of hydrogen gas to the blue companion star (right). This interaction process happened over about 250 years and affected the supernova explosion to such an extent that SN 1993J was later known as one of the most peculiar supernovae ever seen

PIX4583292

The evolution of stars - Illustration - The evolution of the stars - Illustration - All stars are born in interstellar clouds but according to their masses they will follow different destinies

The evolution of stars - Illustration - The evolution of the stars - Illustration - All stars are born in interstellar clouds but according to their masses they will follow different destinies

P. Carril

PIX4573022

Nebula IC 2220 in the Carene - The IC 2220 nebula - This reflexion nebula is illuminated by a giant red star, the star HD 65670. IC2220 is a type of reflection nebula formed as a result of mass loss from its parent star, the red giant HD 65750. The yellowish red light is the reflected 1ight of this parent star. The bipolar nebula (the mass of 1/100 that of our sun) was produced in an earlier phase of intense mass loss during the “” giant”” phase of this evolving star

Nebula IC 2220 in the Carene - The IC 2220 nebula - This reflexion nebula is illuminated by a giant red star, the star HD 65670. IC2220 is a type of reflection nebula formed as a result of mass loss from its parent star, the red giant HD 65750. The yellowish red light is the reflected 1ight of this parent star. The bipolar nebula (the mass of 1/100 that of our sun) was produced in an earlier phase of intense mass loss during the “” giant”” phase of this evolving star

R. Gendler

PIX4622508

Mel 25, the Hyades, is an open cluster visible to the naked eye in the constellation Taurus (photo)

Mel 25, the Hyades, is an open cluster visible to the naked eye in the constellation Taurus (photo)

PIX6318751

Artist's view of the star Zeta Piscium: The star Zeta Piscium seen in the sky of an exoplanet. This star is actually a binary star composed of a red giant and a white dwarf. Zeta Piscium is a binary star system consisting of a red giant and a white dwarf

Artist's view of the star Zeta Piscium: The star Zeta Piscium seen in the sky of an exoplanet. This star is actually a binary star composed of a red giant and a white dwarf. Zeta Piscium is a binary star system consisting of a red giant and a white dwarf

Miller, Ron (b.1947)

PIX4572721

Nebula IC 2220 in the Carene - A mass - loss star in IC 2220 - This nebula is illuminated by a giant red star, the star HD 65670. Image obtained by Siding Spring's 3.9m telescope. The bright, supergiant star at the centre of this nebula is known only by its catalog designation, HD 65750. The nebulosity around the star is the result of light reflected by dust surrounding it. The dust is thought to consist mainly of particles of silica condensed from material which the star is losing from its distended surface at a fairly steady rate. The rate of mass loss is much higher than in normal stars and is sufficient to produce the reflection nebula IC 2220. The stellar nature of the central object is revealed by the four diffraction spikes extending from it. These are artifacts due to structures within the telescope. The light from the star has also produced the annular halation ring (a photographic artefact) that ornaments the nebula. These features, real or otherwise, have provoked the name '

Nebula IC 2220 in the Carene - A mass - loss star in IC 2220 - This nebula is illuminated by a giant red star, the star HD 65670. Image obtained by Siding Spring's 3.9m telescope. The bright, supergiant star at the centre of this nebula is known only by its catalog designation, HD 65750. The nebulosity around the star is the result of light reflected by dust surrounding it. The dust is thought to consist mainly of particles of silica condensed from material which the star is losing from its distended surface at a fairly steady rate. The rate of mass loss is much higher than in normal stars and is sufficient to produce the reflection nebula IC 2220. The stellar nature of the central object is revealed by the four diffraction spikes extending from it. These are artifacts due to structures within the telescope. The light from the star has also produced the annular halation ring (a photographic artefact) that ornaments the nebula. These features, real or otherwise, have provoked the name '

PIX4622497

Double star Gliese 623 - Double star system Gliese 623 in Hercules - Gliese 623 is a double star located about 25 years ago - light in the constellation Hercules. The Hubble space telescope was able for the first time to obtain an image of the two stars that make up this system, in June 1994. The two stars are separated by about twice the distance from Earth to Sun. On the right, 623b, a star 60,000 times less bright than the Sun, and 10 times less massive. Its nature is misidentified, it's a red dwarf or a brown dwarf. A dim double star system cataloged as Gliese 623 lies 25 light - years from Earth, in the constellation of Hercules. The individual stars of this binary system were distinguished for the first time when the Hubble Space Telescope's Faint Object Camera recorded this image in June 1994. They are separated by 200 million miles - about twice the Earth/Sun distance. On the right, the fainter Gliese 623b is 60,000 times less luminous than the Sun and approximately 10 times le

Double star Gliese 623 - Double star system Gliese 623 in Hercules - Gliese 623 is a double star located about 25 years ago - light in the constellation Hercules. The Hubble space telescope was able for the first time to obtain an image of the two stars that make up this system, in June 1994. The two stars are separated by about twice the distance from Earth to Sun. On the right, 623b, a star 60,000 times less bright than the Sun, and 10 times less massive. Its nature is misidentified, it's a red dwarf or a brown dwarf. A dim double star system cataloged as Gliese 623 lies 25 light - years from Earth, in the constellation of Hercules. The individual stars of this binary system were distinguished for the first time when the Hubble Space Telescope's Faint Object Camera recorded this image in June 1994. They are separated by 200 million miles - about twice the Earth/Sun distance. On the right, the fainter Gliese 623b is 60,000 times less luminous than the Sun and approximately 10 times le

PIX4572158

The evolution of stars - Illustration - The evolution of the stars - Illustration - All stars are born in interstellar clouds but depending on their masses, they will follow different destinies. Stars are all born in interstellar clouds but according to their mass, they will follow different destinies

The evolution of stars - Illustration - The evolution of the stars - Illustration - All stars are born in interstellar clouds but depending on their masses, they will follow different destinies. Stars are all born in interstellar clouds but according to their mass, they will follow different destinies

P. Carril

PIX4573028

Comparison of Sun, Sirius and Red Giant Sizes - Size comparison: Sun Sirius and red giant

Comparison of Sun, Sirius and Red Giant Sizes - Size comparison: Sun Sirius and red giant

Miller, Ron (b.1947)

PIX4573081

Constellation of Taurus - Constellation of Taurus - Taurus, (the Bull) is one of the most ancient constellations, and appears in artefacts as old as western civilisation itself. The bull is still a figure of strength and fertility in cultures around the world. In the sky the distinctive 'V' shape of his head and long horns tipped by beta (ss) and zeta Tau is easily recognised. If the purpose of the horns was in doubt, the English name for ss Tau is Alnath, meaning 'the butting one'. The bull's glowing red eye of Aldebaran completes the picture, and its location between the delicate Pleiades and the aggressive stance of Orion makes Taurus hard to overlook. Despite its masculine connotations, the constellation is rich in female icons; both the Hyades and Pleiades star clusters are daughters of Atlas and both are important astronomically. The Pleiades (or the Seven Sisters) are a group of young stars at a distance of about 440 light years and on long exposure photographs are seen to be em

Constellation of Taurus - Constellation of Taurus - Taurus, (the Bull) is one of the most ancient constellations, and appears in artefacts as old as western civilisation itself. The bull is still a figure of strength and fertility in cultures around the world. In the sky the distinctive 'V' shape of his head and long horns tipped by beta (ss) and zeta Tau is easily recognised. If the purpose of the horns was in doubt, the English name for ss Tau is Alnath, meaning 'the butting one'. The bull's glowing red eye of Aldebaran completes the picture, and its location between the delicate Pleiades and the aggressive stance of Orion makes Taurus hard to overlook. Despite its masculine connotations, the constellation is rich in female icons; both the Hyades and Pleiades star clusters are daughters of Atlas and both are important astronomically. The Pleiades (or the Seven Sisters) are a group of young stars at a distance of about 440 light years and on long exposure photographs are seen to be em

PIX4594065

Artist view of T Coronae Borealis - T Coronae Borealis. Artwork - Artist's view of T Coronae Borealis, a symbiotic star composed of two stars (red giant and dwarf) so close that they constantly exchange part of their material. T Coronae Borealis is a recurrente nova in the constellation Boreal Crown. Artwork of a symbiotic star, T Coronae Borealis. This is a system of a red giant close to a dwarf star. It is a nova located in Corona Borealis

Artist view of T Coronae Borealis - T Coronae Borealis. Artwork - Artist's view of T Coronae Borealis, a symbiotic star composed of two stars (red giant and dwarf) so close that they constantly exchange part of their material. T Coronae Borealis is a recurrente nova in the constellation Boreal Crown. Artwork of a symbiotic star, T Coronae Borealis. This is a system of a red giant close to a dwarf star. It is a nova located in Corona Borealis

S. Numazawa

PIX4572567

Constellation of Taurus - Constellation of Taurus - On the right of the image, nebula NGC 1499, on the top, nebulae IC 1805 and IC 1848

Constellation of Taurus - Constellation of Taurus - On the right of the image, nebula NGC 1499, on the top, nebulae IC 1805 and IC 1848

B&S.Fletcher

PIX4594054

Globular cluster 47 Toucan - The globular cluster 47 Tucanae NGC 104 - The globular cluster 47 Toucan (or NGC 104) is visible to the naked eye from the southern hemisphere. Located about 15000 years ago - light it contains several million stars, some of which are among the oldest stars known today. Image obtained from the 3.9m telescope of Siding Spring, Australia. Among the many spectacular objects in the southern skies are two magnificent naked - eye globular clusters, omega Centauri and 47 Tucanae. These ancient cities of stars are captives of the Milky Way but were formed long before our Galaxy assumed its present shape, indeed these clusters have some of the oldest known stars. 47 Tuc is about 15,000 light years distant and contains several million stars, as many as some minor galaxies. The crowded central region leads to occasional stellar encounters and it is in 47 Tuc that rapidly - spinning pulsars have been discovered by radio astronomers. Although the light of globular clust

Globular cluster 47 Toucan - The globular cluster 47 Tucanae NGC 104 - The globular cluster 47 Toucan (or NGC 104) is visible to the naked eye from the southern hemisphere. Located about 15000 years ago - light it contains several million stars, some of which are among the oldest stars known today. Image obtained from the 3.9m telescope of Siding Spring, Australia. Among the many spectacular objects in the southern skies are two magnificent naked - eye globular clusters, omega Centauri and 47 Tucanae. These ancient cities of stars are captives of the Milky Way but were formed long before our Galaxy assumed its present shape, indeed these clusters have some of the oldest known stars. 47 Tuc is about 15,000 light years distant and contains several million stars, as many as some minor galaxies. The crowded central region leads to occasional stellar encounters and it is in 47 Tuc that rapidly - spinning pulsars have been discovered by radio astronomers. Although the light of globular clust

PIX4564310

Artist's view of a red dwarf star in the sky of an exoplanet - A red dwarf seen from an exoplanet. Artwork - Artist's view of an exoplanet covered in ice with its red dwarf star too cold to heat it up. Artwork showing an icy exoplanet, with its star, a red dwarf, too cold to heat the planet surface

Artist's view of a red dwarf star in the sky of an exoplanet - A red dwarf seen from an exoplanet. Artwork - Artist's view of an exoplanet covered in ice with its red dwarf star too cold to heat it up. Artwork showing an icy exoplanet, with its star, a red dwarf, too cold to heat the planet surface

Miller, Ron (b.1947)

PIX4572483

Open cluster NGC 4755 - Jewel Box - The Jewel Box cluster, NGC 4755 - NGC 4755 is located in the constellation of the Southern Cross at a distance of 7800 years - light from Earth. The bright orange star is Kappa Crucis, a supergiant red star. This famous group of young bright stars is an open cluster some 7800 light years from the Sun. It was named the Jewel Box from its description by Sir John Herschel as 'a casket of variously coloured precious stones', which refers to its appearance in the telescope. The bright orange star is kappa Crucis, and it contrasts strongly against its predominantly blue, hot companions. Kappa Cru is a very large, (hence very luminous) quite young star in its red supergiant stage, which paradoxically indicates that its life is drawing to a close. The cluster is looks like a star to the unaided eye and appears close to the eastern - most star of the Southern Cross, so is only visible from southern latitude

Open cluster NGC 4755 - Jewel Box - The Jewel Box cluster, NGC 4755 - NGC 4755 is located in the constellation of the Southern Cross at a distance of 7800 years - light from Earth. The bright orange star is Kappa Crucis, a supergiant red star. This famous group of young bright stars is an open cluster some 7800 light years from the Sun. It was named the Jewel Box from its description by Sir John Herschel as 'a casket of variously coloured precious stones', which refers to its appearance in the telescope. The bright orange star is kappa Crucis, and it contrasts strongly against its predominantly blue, hot companions. Kappa Cru is a very large, (hence very luminous) quite young star in its red supergiant stage, which paradoxically indicates that its life is drawing to a close. The cluster is looks like a star to the unaided eye and appears close to the eastern - most star of the Southern Cross, so is only visible from southern latitude

PIX4568295

Artist's view of the star Zeta Piscium: The star Zeta Piscium seen in the sky of an exoplanet. This star is actually a binary star composed of a red giant and a white dwarf. Zeta Piscium is a binary star system consisting of a red giant and a white dwarf

Artist's view of the star Zeta Piscium: The star Zeta Piscium seen in the sky of an exoplanet. This star is actually a binary star composed of a red giant and a white dwarf. Zeta Piscium is a binary star system consisting of a red giant and a white dwarf

Miller, Ron (b.1947)

PIX4572723

Nebula IC 2220 in the Carene - The IC 2220, nebula, deep image - This nebula is illuminated by a large red star, the star HD 65670. Image obtained by Siding Spring's 3.9m telescope. Many stars lose a substantial part of their mass as they age. The more massive the star, the greater the fraction of their substance is lost. Much material is ejected by intense stellar winds driven from the surface of extremely hot stars and the mass loss is often only detectable in the stellar spectrum. In cooler stars temperatures may be low enough for elements or simple compounds to form solid grains in the star's outer atmosphere. This is seen as dust, and sometimes there is enough to reflect the light of the star within. As is often the case with stellar outflows, the IC 2220 reflection nebula is bipolar, hinting at conditions near the surface of the central star

Nebula IC 2220 in the Carene - The IC 2220, nebula, deep image - This nebula is illuminated by a large red star, the star HD 65670. Image obtained by Siding Spring's 3.9m telescope. Many stars lose a substantial part of their mass as they age. The more massive the star, the greater the fraction of their substance is lost. Much material is ejected by intense stellar winds driven from the surface of extremely hot stars and the mass loss is often only detectable in the stellar spectrum. In cooler stars temperatures may be low enough for elements or simple compounds to form solid grains in the star's outer atmosphere. This is seen as dust, and sometimes there is enough to reflect the light of the star within. As is often the case with stellar outflows, the IC 2220 reflection nebula is bipolar, hinting at conditions near the surface of the central star

PIX4622518

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