NASA CASSINI SPACECRAFT IMAGE OF PLANET JUPITER AND MOON GANYMEDE.
The solar system's largest moon, Ganymede, is captured here alongside the planet Jupiter in this picture taken by NASA's Cassini spacecraft on December 3, 2000. Ganymede is larger than the planets Mercury and Pluto and Saturn's largest moon, Titan. Both Ganymede and Titan have greater surface area than the entire Eurasian continent on our planet. Cassini was 26.5 million kilometers (16.5 million miles) from Ganymede when this image was taken. The smallest visible features are about 160 kilometers (about 100 miles) across.