Jupiter et Io vus par la sonde New Horizons

Jupiter et Io vus par la sonde New Horizons. Photomontage. - Jupiter and Io seen by New Horizons spacecraft. Composite. - Vue de Jupiter obtenue le 28 Fevrier 2007 par la sonde New Horizons. Cette image en infrarouge revele les differentes altitudes des nuages joviens; en bleu, les nuages de hautes altitudes, en rouge, des nuages plus bas. Au premier plan, le satellite Io vu par la meme sonde le 1er Mars 2007. L'image montre sur la partie sombre un panache provenant de l'eruption du volcan Tvashtar. Image composite en pseudo vraies couleurs. This is a montage of New Horizons images of Jupiter and its volcanic moon Io, taken during the spacecraft's Jupiter flyby in early 2007. The Jupiter image is an infrared color composite taken by the spacecraft's near - infrared imaging spectrometer, the Linear Etalon Imaging Spectral Array (LEISA) at 1:40 UT on Feb. 28, 2007. The infrared wavelengths used (red: 1.59 um, green: 1.94 um, blue: 1.85 um) highlight variations in the altitude of the Jovian cloud tops, with blue denoting high - altitude clouds and hazes, and red indicating deeper clouds. The prominent bluish - white oval is the Great Red Spot. The observation was made at a solar phase angle of 75 degrees but has been projected onto a crescent to remove distortion caused by Jupiter's rotation during the scan. The Io image, taken at 00:25 UT on March 1st 2007, is an approximately true - color composite taken by the panchromatic Long - Range Reconnaissance Imager (LORRI), with color information provided by the 0.5 um (blue"") and 0.9 um (""methane"") channels of the Multispectral Visible Imaging Camera (MVIC). The image shows a major eruption in progress on Io's night side, at the northern volcano Tvashtar. Incandescent lava glows red beneath a 330 - kilometer high volcanic plume, whose uppermost portions are illuminated by sunlight. The plume appears blue due to scattering of light by small particles in the plume.