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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

Brown dwarf star Gliese 229 b - Brown dwarf Gliese 229 b - Artist view of the brown dwarf star Gliese 229B. Discovered in 1995 in the constellation Lievre at 18 years - light from Earth, this brown dwarf is 30 to 40 times more massive than Jupiter and is estimated to be 2 to 4 billion years old. Top left is the red dwarf star Gliese 229A. This is how the brown dwarf Gliese 229b might appear from a distance of about a half million miles. Glowing like a charcoal ember, Gliese 229 b was discovered in 1995 and is 19 light years from the Earth. This brown dwarf orbits the red dwarf Gliese 229A in the constellation Lepus. Gliese A can be seen shining dimly on the upper left. These two dwarfs are about four billion miles apart, about the same distance between Pluto and our sun. Gliese 229 b is believed to be 30 to 40 times more massive than the planet Jupiter, which is massive enough for Gliese 229 b to sustain deuterium fusion, but not enough mass to initiate hydrogen fusion like our Sun. As

Brown dwarf star Gliese 229 b - Brown dwarf Gliese 229 b - Artist view of the brown dwarf star Gliese 229B. Discovered in 1995 in the constellation Lievre at 18 years - light from Earth, this brown dwarf is 30 to 40 times more massive than Jupiter and is estimated to be 2 to 4 billion years old. Top left is the red dwarf star Gliese 229A. This is how the brown dwarf Gliese 229b might appear from a distance of about a half million miles. Glowing like a charcoal ember, Gliese 229 b was discovered in 1995 and is 19 light years from the Earth. This brown dwarf orbits the red dwarf Gliese 229A in the constellation Lepus. Gliese A can be seen shining dimly on the upper left. These two dwarfs are about four billion miles apart, about the same distance between Pluto and our sun. Gliese 229 b is believed to be 30 to 40 times more massive than the planet Jupiter, which is massive enough for Gliese 229 b to sustain deuterium fusion, but not enough mass to initiate hydrogen fusion like our Sun. As

Walter B Myers

PIX4572553

The smallest stars - Artist's view - The smallest stars. Artwork - Comparison to the scale of the smallest stars with Jupiter and the Sun. From left to right: Jupiter, a brown dwarf (same size as Jupiter but 50 times more massive), dwarf L (younger brown dwarf), red dwarf, Sun. From left to right: Jupiter (a failed star), a brown dwarf (same size as Jupiter but 50 times more massive), a “” L”” dwarf (brown dwarf younger), a red dwarf and the sun for comparison

The smallest stars - Artist's view - The smallest stars. Artwork - Comparison to the scale of the smallest stars with Jupiter and the Sun. From left to right: Jupiter, a brown dwarf (same size as Jupiter but 50 times more massive), dwarf L (younger brown dwarf), red dwarf, Sun. From left to right: Jupiter (a failed star), a brown dwarf (same size as Jupiter but 50 times more massive), a “” L”” dwarf (brown dwarf younger), a red dwarf and the sun for comparison

L. Bret

PIX4572490

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

Brown dwarf star Gliese 229b: Artist's view of the brown dwarf star Gliese 229 B seen from a possible satellite. Discovered in 1995 in the constellation Lievre at 18 light years from Earth, this brown dwarf is 30 to 40 times more massive than Jupiter and would be 2 to 4 billion years old. Top left is the red dwarf star Gliese 229A. This is how the brown dwarf Gliese 229b might appear from a satellite. Gliese 229 b was discovered in 1995 and is 19 light years from the Earth. This brown dwarf orbits the red dwarf Gliese 229A in the constellation Lepus. Gliese A can be seen shining dimly on the upper left. These two dwarfs are about four billion miles apart, about the same distance between Pluto and our sun

Brown dwarf star Gliese 229b: Artist's view of the brown dwarf star Gliese 229 B seen from a possible satellite. Discovered in 1995 in the constellation Lievre at 18 light years from Earth, this brown dwarf is 30 to 40 times more massive than Jupiter and would be 2 to 4 billion years old. Top left is the red dwarf star Gliese 229A. This is how the brown dwarf Gliese 229b might appear from a satellite. Gliese 229 b was discovered in 1995 and is 19 light years from the Earth. This brown dwarf orbits the red dwarf Gliese 229A in the constellation Lepus. Gliese A can be seen shining dimly on the upper left. These two dwarfs are about four billion miles apart, about the same distance between Pluto and our sun

Miller, Ron (b.1947)

PIX4607542

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

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

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

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

Binary Star - Artist View - Binary star. Artist view - Binary Star - mass exchange between a red giant a blue dwarf. When the material removed from the giant comes into contact with the accretion disc of the blue dwarf, it emits X-rays visible in the form of flashes by astronomers. This mass exchange process leads in a few thousand years to a nova explosion. Mass transfer between a red giant and a blue dwarf star producing X - ray emission and later a nova explosion

Binary Star - Artist View - Binary star. Artist view - Binary Star - mass exchange between a red giant a blue dwarf. When the material removed from the giant comes into contact with the accretion disc of the blue dwarf, it emits X-rays visible in the form of flashes by astronomers. This mass exchange process leads in a few thousand years to a nova explosion. Mass transfer between a red giant and a blue dwarf star producing X - ray emission and later a nova explosion

P. Carril

PIX4572585

Binary Star - Artist View - Binary star. Artist view - A white dwarf orbiting very close to her giant red companion tears him little by little from the material. This unstable couple will soon explode in supernova. Mass transfer between a red giant and a white dwarf star producing later a supernova explosion

Binary Star - Artist View - Binary star. Artist view - A white dwarf orbiting very close to her giant red companion tears him little by little from the material. This unstable couple will soon explode in supernova. Mass transfer between a red giant and a white dwarf star producing later a supernova explosion

P. Carril

PIX4572634

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

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

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

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

Brown dwarf around the red dwarf star Gliese 229 - Brown dwarf around red dwarf Gliese 229 - First false-colored image of a brown dwarf. With a mass of 20 to 50 times that of Jupiter, but of a diameter equivalent to the gas planet, GL229B, is orbiting around the red dwarf star Gliese 229, about 18 years - light from Earth in the constellation Lievre. On the left, the observation made from the ground in adaptive optics at Mount Palomar, October 27, 1994. On the right, the image obtained by the Hubble space telescope on November 17, 1995. These two false - color telescope images reveal the faintest object ever seen around a star beyond our Sun, and the first unambiguous detection of a brown dwarf. The brown dwarf, called GL229B, orbits the red dwarf star Gliese 229, located approximately 18 light - years away in the constellation Lepus. The brown dwarf is about 20 - 50 times the mass of Jupiter, but is so dense it is about the same diameter as Jupiter (80,000 miles). Brown dwarfs are a m

Brown dwarf around the red dwarf star Gliese 229 - Brown dwarf around red dwarf Gliese 229 - First false-colored image of a brown dwarf. With a mass of 20 to 50 times that of Jupiter, but of a diameter equivalent to the gas planet, GL229B, is orbiting around the red dwarf star Gliese 229, about 18 years - light from Earth in the constellation Lievre. On the left, the observation made from the ground in adaptive optics at Mount Palomar, October 27, 1994. On the right, the image obtained by the Hubble space telescope on November 17, 1995. These two false - color telescope images reveal the faintest object ever seen around a star beyond our Sun, and the first unambiguous detection of a brown dwarf. The brown dwarf, called GL229B, orbits the red dwarf star Gliese 229, located approximately 18 light - years away in the constellation Lepus. The brown dwarf is about 20 - 50 times the mass of Jupiter, but is so dense it is about the same diameter as Jupiter (80,000 miles). Brown dwarfs are a m

PIX4572124

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

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

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

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

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

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

PIX4573031

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

U Geminorum in the sky of an exoplanet - U Geminorum seen from an exoplanet. Artwork - U Geminorum is a dwarf nova, a variable star composed of a white dwarf orbiting around a red dwarf. This binary greenhouse system is represented here in the sky of an extrasolar planet. Artwork showing U Geminorum in the sky of an exoplanet. U Geminorum, in the constellation Gemini, is an archetypal example of a dwarf nova. The binary star system consists of a white dwarf closely orbiting a red dwarf

U Geminorum in the sky of an exoplanet - U Geminorum seen from an exoplanet. Artwork - U Geminorum is a dwarf nova, a variable star composed of a white dwarf orbiting around a red dwarf. This binary greenhouse system is represented here in the sky of an extrasolar planet. Artwork showing U Geminorum in the sky of an exoplanet. U Geminorum, in the constellation Gemini, is an archetypal example of a dwarf nova. The binary star system consists of a white dwarf closely orbiting a red dwarf

Miller, Ron (b.1947)

PIX4574280

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

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

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

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

Artist's view of an eruptive star - Flare star. Artwork - An eruptive star is a variable star that can manifest a dramatic and imforeseeable increase in luminosite from a few minutes to a few hours. From X-rays to radios, the spectrum increases in intensity. Eruptive stars are red dwarves, although recent research indicates that brown dwarves may also be capable of eruptions. A flare star is a variable star which can undergo unpredictable dramatic increases in brightness for a few minutes or a few hours. The brightness increase is across the spectrum, from X - rays to radio waves. Flare stars are dim red dwarfs, although recent research indicates that brown dwarfs might also be capable of flaring

Artist's view of an eruptive star - Flare star. Artwork - An eruptive star is a variable star that can manifest a dramatic and imforeseeable increase in luminosite from a few minutes to a few hours. From X-rays to radios, the spectrum increases in intensity. Eruptive stars are red dwarves, although recent research indicates that brown dwarves may also be capable of eruptions. A flare star is a variable star which can undergo unpredictable dramatic increases in brightness for a few minutes or a few hours. The brightness increase is across the spectrum, from X - rays to radio waves. Flare stars are dim red dwarfs, although recent research indicates that brown dwarfs might also be capable of flaring

Dixon, Don (b.1951)

PIX4572699

Exoplanets around a red dwarf star - Exoplanets around a red dwarf star - Artist's view of extrasolar planets orbiting a red dwarf star. This artist's concept illustrates a young, red dwarf star surrounded by three planets. Such stars are dimmer and smaller than yellow stars like our sun, which makes them ideal targets for astronomers wishing to take images of planets outside our solar system, called exoplanets

Exoplanets around a red dwarf star - Exoplanets around a red dwarf star - Artist's view of extrasolar planets orbiting a red dwarf star. This artist's concept illustrates a young, red dwarf star surrounded by three planets. Such stars are dimmer and smaller than yellow stars like our sun, which makes them ideal targets for astronomers wishing to take images of planets outside our solar system, called exoplanets

PIX4573338

Artist view of Gliese 710 near the cloud of Oort - Gliese 710 near Oort cloud - Artist view - The star Gliese 710 is a red dwarf of our galaxy, located about 63 years ago - light from the Sun. This star has its own movement and is approaching our solar system that it may reach within 1.4 million years. The cloud of Oort could be disturbed. Comets in our solar system's Oort Cloud are disturbed by the passing of a nearby dwarf star, Gliese 710, in the distant future

Artist view of Gliese 710 near the cloud of Oort - Gliese 710 near Oort cloud - Artist view - The star Gliese 710 is a red dwarf of our galaxy, located about 63 years ago - light from the Sun. This star has its own movement and is approaching our solar system that it may reach within 1.4 million years. The cloud of Oort could be disturbed. Comets in our solar system's Oort Cloud are disturbed by the passing of a nearby dwarf star, Gliese 710, in the distant future

Dixon, Don (b.1951)

PIX4572453

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

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

Planetary system around Trappist-1 - Artist's impression of the TRAPPIST-1 planetary system: Artist's view of extrasolar planets around the red dwarf star TRAPPIST-1. At least seven exoplanets the size of the Earth are orbiting this star 40 light years ago in the constellation Aquarius. This artist's impression shows the view from the surface of one of the planets in the TRAPPIST-1 system. At least seven planets orbit this ultra cool dwarf star 40 light-years from Earth in Aquarius constellation and they are all roughly the same size as the Earth. They are at the right distances from their star for liquid water to exist on the surfaces of several of them.

Planetary system around Trappist-1 - Artist's impression of the TRAPPIST-1 planetary system: Artist's view of extrasolar planets around the red dwarf star TRAPPIST-1. At least seven exoplanets the size of the Earth are orbiting this star 40 light years ago in the constellation Aquarius. This artist's impression shows the view from the surface of one of the planets in the TRAPPIST-1 system. At least seven planets orbit this ultra cool dwarf star 40 light-years from Earth in Aquarius constellation and they are all roughly the same size as the Earth. They are at the right distances from their star for liquid water to exist on the surfaces of several of them.

PIX4608376

Planetary system around Trappist-1 - Artist's impressions of the TRAPPIST-1 planetary system: Artist's view of extrasolar planets around the red dwarf star TRAPPIST-1. At least seven exoplanets the size of the Earth are orbiting this star 40 light years ago in the constellation Aquarius. All could contain water. This artist's impression shows several of the planets orbiting the ultra-cool red dwarf star TRAPPIST-1. New observations, when combined with very sophisticated analysis, have now yielded good estimates of the densities of all seven of the Earth-sized planets and suggest that they are rich in volatile materials, probably water

Planetary system around Trappist-1 - Artist's impressions of the TRAPPIST-1 planetary system: Artist's view of extrasolar planets around the red dwarf star TRAPPIST-1. At least seven exoplanets the size of the Earth are orbiting this star 40 light years ago in the constellation Aquarius. All could contain water. This artist's impression shows several of the planets orbiting the ultra-cool red dwarf star TRAPPIST-1. New observations, when combined with very sophisticated analysis, have now yielded good estimates of the densities of all seven of the Earth-sized planets and suggest that they are rich in volatile materials, probably water

PIX4608442

Planetary system around Trappist-1 - Artist's impressions of the TRAPPIST-1 planetary system: Artist's view of extrasolar planets around the red dwarf star TRAPPIST-1. At least seven exoplanets the size of the Earth are orbiting this star 40 light years ago in the constellation Aquarius. All could contain water. This artist's impression shows several of the planets orbiting the ultra-cool red dwarf star TRAPPIST-1. New observations, when combined with very sophisticated analysis, have now yielded good estimates of the densities of all seven of the Earth-sized planets and suggest that they are rich in volatile materials, probably water

Planetary system around Trappist-1 - Artist's impressions of the TRAPPIST-1 planetary system: Artist's view of extrasolar planets around the red dwarf star TRAPPIST-1. At least seven exoplanets the size of the Earth are orbiting this star 40 light years ago in the constellation Aquarius. All could contain water. This artist's impression shows several of the planets orbiting the ultra-cool red dwarf star TRAPPIST-1. New observations, when combined with very sophisticated analysis, have now yielded good estimates of the densities of all seven of the Earth-sized planets and suggest that they are rich in volatile materials, probably water

PIX4608435

Planetary system around Trappist-1 - Artist's impressions of the TRAPPIST-1 planetary system: Artist's view of extrasolar planets around the red dwarf star TRAPPIST-1. At least seven exoplanets the size of the Earth are orbiting this star 40 light years ago in the constellation Aquarius. All could contain water. This artist's impression shows several of the planets orbiting the ultra-cool red dwarf star TRAPPIST-1. New observations, when combined with very sophisticated analysis, have now yielded good estimates of the densities of all seven of the Earth-sized planets and suggest that they are rich in volatile materials, probably water

Planetary system around Trappist-1 - Artist's impressions of the TRAPPIST-1 planetary system: Artist's view of extrasolar planets around the red dwarf star TRAPPIST-1. At least seven exoplanets the size of the Earth are orbiting this star 40 light years ago in the constellation Aquarius. All could contain water. This artist's impression shows several of the planets orbiting the ultra-cool red dwarf star TRAPPIST-1. New observations, when combined with very sophisticated analysis, have now yielded good estimates of the densities of all seven of the Earth-sized planets and suggest that they are rich in volatile materials, probably water

PIX4608398

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

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

Life on an exoplanet - Life on a red dwarf exoplanet: Traces of vegetation on the surface of an exoplanet orbiting around a red dwarf. Struggle for life in the twilight zone of a red dwarf planet

Life on an exoplanet - Life on a red dwarf exoplanet: Traces of vegetation on the surface of an exoplanet orbiting around a red dwarf. Struggle for life in the twilight zone of a red dwarf planet

Miller, Ron (b.1947)

PIX4607776

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

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

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

PIX4573006

Exoplanete Gliese 581 e: Artist's view of the extrasolar planet Gliese 581 e. Artist's impression of the star red dwarf Gliese 581 shining with the extrasolar planet Gliese 581 e foreground

Exoplanete Gliese 581 e: Artist's view of the extrasolar planet Gliese 581 e. Artist's impression of the star red dwarf Gliese 581 shining with the extrasolar planet Gliese 581 e foreground

Miller, Ron (b.1947)

PIX4608001

Exoplanete Ross 128 b: Ross 128 b is an extrasolar planet probably of an Earth type, located only 11 light years from Earth in the constellation of the Virgin. Planet Ross 128 b, with its red dwarf parent star in the background. This planet, which lies only 11 light-years from Earth, was found by a team using Eso's unique planet-hunting HARPS instrument. The new world is now the second-closest temperate planet to be detected after Proxima b. It is also the closest planet to be discovered orbiting an inactive red dwarf star, which may increase the likelihood that this planet could potentially sustain life.

Exoplanete Ross 128 b: Ross 128 b is an extrasolar planet probably of an Earth type, located only 11 light years from Earth in the constellation of the Virgin. Planet Ross 128 b, with its red dwarf parent star in the background. This planet, which lies only 11 light-years from Earth, was found by a team using Eso's unique planet-hunting HARPS instrument. The new world is now the second-closest temperate planet to be detected after Proxima b. It is also the closest planet to be discovered orbiting an inactive red dwarf star, which may increase the likelihood that this planet could potentially sustain life.

Miller, Ron (b.1947)

PIX4608431

Exoplanete Gliese 876 d: Artist's view of the extrasolar planet Gliese 876 d, a super earth in orbit around the red dwarf Gliese 876. Artist's impression of the extrasolar planet Gliese 876 d, a Super-earth orbiting the red dwarf star Gliese 876, located approximately 15 light-years away in the constellation of Aquarius

Exoplanete Gliese 876 d: Artist's view of the extrasolar planet Gliese 876 d, a super earth in orbit around the red dwarf Gliese 876. Artist's impression of the extrasolar planet Gliese 876 d, a Super-earth orbiting the red dwarf star Gliese 876, located approximately 15 light-years away in the constellation of Aquarius

Miller, Ron (b.1947)

PIX4607886

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

Artist's view of the exoplanet Gliese 581 b: Artist's view of Gliese 581b, an extrasolar planet orbiting the red dwarf star Gliese 581. This planet has a mass similar to Neptune and is very close to its star. Gliese 581 b is an extrasolar planet orbiting the star red dwarf Gliese 581

Artist's view of the exoplanet Gliese 581 b: Artist's view of Gliese 581b, an extrasolar planet orbiting the red dwarf star Gliese 581. This planet has a mass similar to Neptune and is very close to its star. Gliese 581 b is an extrasolar planet orbiting the star red dwarf Gliese 581

Miller, Ron (b.1947)

PIX4607995

Exoplanete Ross 128 b: Ross 128 b is an extrasolar planet probably of an Earth type, located only 11 light years from Earth in the constellation of the Virgin. Planet Ross 128 b, with its red dwarf parent star in the background. This planet, which lies only 11 light-years from Earth, was found by a team using Eso's unique planet-hunting HARPS instrument. The new world is now the second-closest temperate planet to be detected after Proxima b. It is also the closest planet to be discovered orbiting an inactive red dwarf star, which may increase the likelihood that this planet could potentially sustain life. Ross 128 b will be a prime target for Eso's Extremely Large Telescope, which will be able to search for biomarkers in the planet's atmosphere

Exoplanete Ross 128 b: Ross 128 b is an extrasolar planet probably of an Earth type, located only 11 light years from Earth in the constellation of the Virgin. Planet Ross 128 b, with its red dwarf parent star in the background. This planet, which lies only 11 light-years from Earth, was found by a team using Eso's unique planet-hunting HARPS instrument. The new world is now the second-closest temperate planet to be detected after Proxima b. It is also the closest planet to be discovered orbiting an inactive red dwarf star, which may increase the likelihood that this planet could potentially sustain life. Ross 128 b will be a prime target for Eso's Extremely Large Telescope, which will be able to search for biomarkers in the planet's atmosphere

PIX4608507

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

Exoplanete GJ 1214 b - Exoplanet GJ 1214 b - Illustration showing the transit of the extrasolar planet GJ 1214 b in front of its star, the red dwarf GJ 1214, in the constellation Ophiuchus. GJ 1214 b is a super Earth, six times the mass of the Earth, which has an atmosphere but is too inhospitable to shelter life as we know it. This artist's impression shows how the super - Earth surrounding the nearby star GJ1214 may look. Discovered by the Mearth project and investigated further by the HARPS spectrograph on ESO's 3.6 - metre telescope at La Silla, GJ1214b is the second super - Earth exoplanet for which astronomers have determined the mass and radius, giving vital clues about its structure. It is also the first super - Earth around which an atmosphere has been found. The exoplanet, orbiting a small star only 40 light - years away from us, thus opens dramatic new perspectives in the quest for habitable worlds. The planet, GJ1214b, has a mass about six times that of Earth and its interi

Exoplanete GJ 1214 b - Exoplanet GJ 1214 b - Illustration showing the transit of the extrasolar planet GJ 1214 b in front of its star, the red dwarf GJ 1214, in the constellation Ophiuchus. GJ 1214 b is a super Earth, six times the mass of the Earth, which has an atmosphere but is too inhospitable to shelter life as we know it. This artist's impression shows how the super - Earth surrounding the nearby star GJ1214 may look. Discovered by the Mearth project and investigated further by the HARPS spectrograph on ESO's 3.6 - metre telescope at La Silla, GJ1214b is the second super - Earth exoplanet for which astronomers have determined the mass and radius, giving vital clues about its structure. It is also the first super - Earth around which an atmosphere has been found. The exoplanet, orbiting a small star only 40 light - years away from us, thus opens dramatic new perspectives in the quest for habitable worlds. The planet, GJ1214b, has a mass about six times that of Earth and its interi

PIX4573892

Artist's view of a planetary system around AU Microscopii - Planetary system around AU Microscopii. Artwork - The star AU Microscopii is a red dwarf star surrounded by a dust disc. It is located 33 years of light from Earth. In this illustration, the star is represented in the sky of an exoplanet. AU Microscopii is a red dwarf located 33 light - years away known to have a circumstellar dust disk. The star is shown here in the sky of an exoplanet

Artist's view of a planetary system around AU Microscopii - Planetary system around AU Microscopii. Artwork - The star AU Microscopii is a red dwarf star surrounded by a dust disc. It is located 33 years of light from Earth. In this illustration, the star is represented in the sky of an exoplanet. AU Microscopii is a red dwarf located 33 light - years away known to have a circumstellar dust disk. The star is shown here in the sky of an exoplanet

Miller, Ron (b.1947)

PIX4574170

Earth-type exoplanete around Centauri Proxima - Artist's impression of the planet orbiting Proxima Centauri: Artist's view of the surface of the planet Proxima b orbiting around the red dwarf star Proxima of Centauri, the closest star to the solar system. Proxima b is slightly more massive than the Earth, orbit in habitable areas where the temperature would allow the presence of liquid water on its surface. This artist's impression shows a view of the surface of the planet Proxima b orbiting the red dwarf star Proxima Centauri, the closest star to the Solar System. Proxima b is a little more massive than the Earth and orbits in the habitable zone around Proxima Centauri, where the temperature is suitable for liquid water to exist on its surface

Earth-type exoplanete around Centauri Proxima - Artist's impression of the planet orbiting Proxima Centauri: Artist's view of the surface of the planet Proxima b orbiting around the red dwarf star Proxima of Centauri, the closest star to the solar system. Proxima b is slightly more massive than the Earth, orbit in habitable areas where the temperature would allow the presence of liquid water on its surface. This artist's impression shows a view of the surface of the planet Proxima b orbiting the red dwarf star Proxima Centauri, the closest star to the Solar System. Proxima b is a little more massive than the Earth and orbits in the habitable zone around Proxima Centauri, where the temperature is suitable for liquid water to exist on its surface

Miller, Ron (b.1947)

PIX4608101

Earth-type exoplanete around Centauri Proxima - Artist's impression of the planet orbiting Proxima Centauri: Artist's view of the surface of the planet Proxima b orbiting around the red dwarf star Proxima of Centauri, the closest star to the solar system. Proxima b is slightly more massive than the Earth, orbit in habitable areas where the temperature would allow the presence of liquid water on its surface. This artist's impression shows a view of the surface of the planet Proxima b orbiting the red dwarf star Proxima Centauri, the closest star to the Solar System. Proxima b is a little more massive than the Earth and orbits in the habitable zone around Proxima Centauri, where the temperature is suitable for liquid water to exist on its surface

Earth-type exoplanete around Centauri Proxima - Artist's impression of the planet orbiting Proxima Centauri: Artist's view of the surface of the planet Proxima b orbiting around the red dwarf star Proxima of Centauri, the closest star to the solar system. Proxima b is slightly more massive than the Earth, orbit in habitable areas where the temperature would allow the presence of liquid water on its surface. This artist's impression shows a view of the surface of the planet Proxima b orbiting the red dwarf star Proxima Centauri, the closest star to the Solar System. Proxima b is a little more massive than the Earth and orbits in the habitable zone around Proxima Centauri, where the temperature is suitable for liquid water to exist on its surface

Miller, Ron (b.1947)

PIX4608079

Exoplanete Gliese 581d - Illustration - Artist's view of the star Gliese 581 in the sky of the extrasolar planet Gliese 581 d. Discovered in 20074, this exoplanet in the constellation Libra is considered to be potentially habitable. The atmosphere is dense and its thick cloud layer would plunge the surface into a reddish shade. Artist's impression of the star red dwarf Gliese 581 shining in the sky of the extrasolar planet Gliese 581 d. This exoplanet located in the habitable zone of its star could harbor extraterrestrial life

Exoplanete Gliese 581d - Illustration - Artist's view of the star Gliese 581 in the sky of the extrasolar planet Gliese 581 d. Discovered in 20074, this exoplanet in the constellation Libra is considered to be potentially habitable. The atmosphere is dense and its thick cloud layer would plunge the surface into a reddish shade. Artist's impression of the star red dwarf Gliese 581 shining in the sky of the extrasolar planet Gliese 581 d. This exoplanet located in the habitable zone of its star could harbor extraterrestrial life

Miller, Ron (b.1947)

PIX4574024

Exoplanete Gliese 581 d - Exoplanet Gliese 581 d: Artist's view of the star Gliese 581 in the sky of the extrasolar planet Gliese 581 d. This exoplanet is considered to be potentially habitable. Artist's impression of the star red dwarf Gliese 581 shining in the sky of the extrasolar planet Gliese 581 d. This exoplanet located in the habitable zone of its star could harbor extraterrestrial life

Exoplanete Gliese 581 d - Exoplanet Gliese 581 d: Artist's view of the star Gliese 581 in the sky of the extrasolar planet Gliese 581 d. This exoplanet is considered to be potentially habitable. Artist's impression of the star red dwarf Gliese 581 shining in the sky of the extrasolar planet Gliese 581 d. This exoplanet located in the habitable zone of its star could harbor extraterrestrial life

Miller, Ron (b.1947)

PIX4607991

Earth-type exoplanete around Centauri Proxima - Artist's impression of the planet orbiting Proxima Centauri: Artist's view of Planet Proxima b orbiting around the red dwarf star Proxima of Centauri, the closest star to the solar system. The double star Alpha Centauri AB is visible at the top right of the image. Proxima b is slightly more massive than the Earth, orbit in habitable areas where the temperature would allow the presence of liquid water on its surface. This artist's impression shows a view of the planet Proxima b orbiting the red dwarf star Proxima Centauri, the closest star to the Solar System. The double star Alpha Centauri AB also appears in the image to the upper-right. Proxima b is a little more massive than the Earth and orbits in the habitable zone around Proxima Centauri, where the temperature is suitable for liquid water to exist on its surface

Earth-type exoplanete around Centauri Proxima - Artist's impression of the planet orbiting Proxima Centauri: Artist's view of Planet Proxima b orbiting around the red dwarf star Proxima of Centauri, the closest star to the solar system. The double star Alpha Centauri AB is visible at the top right of the image. Proxima b is slightly more massive than the Earth, orbit in habitable areas where the temperature would allow the presence of liquid water on its surface. This artist's impression shows a view of the planet Proxima b orbiting the red dwarf star Proxima Centauri, the closest star to the Solar System. The double star Alpha Centauri AB also appears in the image to the upper-right. Proxima b is a little more massive than the Earth and orbits in the habitable zone around Proxima Centauri, where the temperature is suitable for liquid water to exist on its surface

Miller, Ron (b.1947)

PIX4608073

August 24, 2016: Artist's view of the surface of Planet Proxima b orbiting the red dwarf star Proxima of Centaur, the closest star to the solar system. The double star Alpha Centauri AB is visible at the top right of the star Proxima. Proxima b is a little more massive than the Earth, orbit in habitable area where the temperature would allow the presence of liquid water on its surface - This artist's impression shows a view of the surface of the planet Proxima b orbiting the red dwarf star Proxima Centauri, the closest star to the Solar System. The double star Alpha Centauri AB also appears in the image to the upper-right of Proxima itself. Proxima b is a little more massive than the Earth and orbits in the habitable zone around Proxima Centauri, where the temperature is suitable for liquid water to exist on its surface

August 24, 2016: Artist's view of the surface of Planet Proxima b orbiting the red dwarf star Proxima of Centaur, the closest star to the solar system. The double star Alpha Centauri AB is visible at the top right of the star Proxima. Proxima b is a little more massive than the Earth, orbit in habitable area where the temperature would allow the presence of liquid water on its surface - This artist's impression shows a view of the surface of the planet Proxima b orbiting the red dwarf star Proxima Centauri, the closest star to the Solar System. The double star Alpha Centauri AB also appears in the image to the upper-right of Proxima itself. Proxima b is a little more massive than the Earth and orbits in the habitable zone around Proxima Centauri, where the temperature is suitable for liquid water to exist on its surface

PIX4650935

August 24, 2016: Artist's view of Planet Proxima b orbiting the red dwarf star Proxima of Centaur, the closest star to the solar system. The double star Alpha Centauri AB is visible between the planet and the star Proxima. Proxima b is a little more massive than Earth, orbit in habitable area or temperature would allow the presence of liquid water on its surface - This artist's impression shows the planet Proxima b orbiting the red dwarf star Proxima Centauri, the closest star to the Solar System. The double star Alpha Centauri AB also appears in the image between the planet and Proxima itself. Proxima b is a little more massive than the Earth and orbits in the habitable zone around Proxima Centauri, where the temperature is suitable for liquid water to exist on its surface

August 24, 2016: Artist's view of Planet Proxima b orbiting the red dwarf star Proxima of Centaur, the closest star to the solar system. The double star Alpha Centauri AB is visible between the planet and the star Proxima. Proxima b is a little more massive than Earth, orbit in habitable area or temperature would allow the presence of liquid water on its surface - This artist's impression shows the planet Proxima b orbiting the red dwarf star Proxima Centauri, the closest star to the Solar System. The double star Alpha Centauri AB also appears in the image between the planet and Proxima itself. Proxima b is a little more massive than the Earth and orbits in the habitable zone around Proxima Centauri, where the temperature is suitable for liquid water to exist on its surface

PIX4650952

Super Terre et Dwarf Rouge - Red Dwarf on the horizon of a Super - Earth - Illustration showing the surface of an extrasolar terrestrial planet, a super Earth, much older than our planet. In the sky, her star, a red dwarf. The exoplanet, too close to its star, knows extreme temperatures making life impossible. Much older than earth and tidally - locked toward its sun, the planet's surface has been eroded by the fierce winds that howl across the twilight zone between eternal day and night

Super Terre et Dwarf Rouge - Red Dwarf on the horizon of a Super - Earth - Illustration showing the surface of an extrasolar terrestrial planet, a super Earth, much older than our planet. In the sky, her star, a red dwarf. The exoplanet, too close to its star, knows extreme temperatures making life impossible. Much older than earth and tidally - locked toward its sun, the planet's surface has been eroded by the fierce winds that howl across the twilight zone between eternal day and night

Dixon, Don (b.1951)

PIX4573965

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