89.9 MB (3.8 MB compressed)
4579 x 6866 pixels
38.9 x 58.2 cm ⏐ 15.3 x 22.9 in (300dpi)
MARK GARLICK / SCIENCE PHOTO LIBRARY MARK GARLICK / SCIENCE PHOTO LIBRARY
Callisto is one of the four Galilean moons of Jupiter, and the farthest one from the planet. Its surface is the most heavily cratered in the known Solar System.
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