L'engin spatial Galileo de la NASA a acquis ses images de la plus haute résolution de l'IO lunaire de Jupiter le 3 juillet 1999 lors de son passage le plus proche à l'IO depuis l'insertion de l'orbite à la fin de 1995. Cette mosaïque de couleurs utilise les filtres proche infrarouge, vert et violet (légèrement plus que la plage visible) de la caméra de l'engin spatial et se rapproche de ce que l'œil humain pourrait voir. La plupart de la surface d'IO a des couleurs pastel, ponctuées par des unités noires, brunes, vertes, orange et rouges près des centres volcaniques actifs. Une fausse version couleur de la mosaïque a été créée pour améliorer le contraste des variations de couleur. La résolution améliorée

• Contributeur: Space collection / Alamy Banque D'Images
• ID de l’image: 2PR581G
• Taille du fichier: 22,4 MB (768,8 KB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 2796 x 2796 px | 23,7 x 23,7 cm | 9,3 x 9,3 inches | 300dpi
• Date de la prise de vue: 3 juillet 1999

Informations supplémentaires

Cette image appartient au domaine public, ce qui signifie que le droit d’auteur a expiré ou que le titulaire du droit d’auteur a renoncé à ses droits. Les frais facturés par Alamy couvrent l’accès à la copie haute résolution de l’image.

Cette image peut avoir des imperfections car il s’agit d’une image historique ou de reportage.

NASA's Galileo spacecraft acquired its highest resolution images of Jupiter's moon Io on July 3, 1999 during its closest pass to Io since orbit insertion in late 1995. This color mosaic uses the near-infrared, green and violet filters (slightly more than the visible range) of the spacecraft's camera and approximates what the human eye would see. Most of Io's surface has pastel colors, punctuated by black, brown, green, orange, and red units near the active volcanic centers. A false color version of the mosaic has been created to enhance the contrast of the color variations. The improved resolution reveals small-scale color units which had not been recognized previously and which suggest that the lavas and sulfurous deposits are composed of complex mixtures. Some of the bright (whitish), high-latitude (near the top and bottom) deposits have an ethereal quality like a transparent covering of frost. Bright red areas were seen previously only as diffuse deposits. However, they are now seen to exist as both diffuse deposits and sharp linear features like fissures. Some volcanic centers have bright and colorful flows, perhaps due to flows of sulfur rather than silicate lava. In this region bright, white material can also be seen to emanate from linear rifts and cliffs. Comparison of this image to previous Galileo images reveals many changes due to the ongoing volcanic activity. North is towards the top of the picture and the sun illuminates the surface from almost directly behind the spacecraft. This illumination geometry is good for imaging color variations, but poor for imaging topographic shading. However, some topographic shading can be seen here due to the combination of relatively high resolution (1.3 kilometers or 0.8 miles per picture element) and the rugged topography over parts of Io. The image is centered at 0.3 degrees north latitude and 137.5 degrees west longitude. The resolution is 1.3 kilometers (0.8 miles) per picture element. The images were taken on Jul

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