Released with Image The Galilean satellite Io floats above the cloudtops of Jupiter in this image captured on the dawn of the new millennium, January 1, 2001 10:00 UTC (spacecraft time), two days after Cassini's closest approach. The image is deceiving: there are 350,000 kilometers -- roughly 2.5 Jupiters -- between Io and Jupiter's clouds. Io is the size of our Moon, and Jupiter is very big.
NASA/JPL/University of Arizona
<a rel="nofollow" class="external free" href="http://photojournal.jpl.nasa.gov/catalog/PIA02879">http://photojournal.jpl.nasa.gov/catalog/PIA02879</a>