Shot of the day: Io and its shadow on the clouds of Jupiter
At this picture made probe Cassini in 2002, a satellite of Jupiter Io casts a clear shadow on the surface of the upper layer of clouds of Jupiter. What's interesting snapshot of the original color, but NASA him a few raised contrast.
Io against the backdrop of Jupiter (photo NASA).
Io is the closest to the gas giant companion, and more than 400 active volcanoes provide it the status of the most geologically active object of the solar system.
The surface of Io (photo NASA).
Since its inception in Galilei in 1610, Io has played a significant role in the formation of modern astronomy. In no small measure thanks to this opening Copernican model of the solar system over the next hundred years has acquired a dominant position; thanks Io Johannes Kepler developed its laws of motion of celestial bodies.
The first interplanetary apparatus earthly origin - Voyager - closer to Io in 1979. The latest - so far - became New Horizons, flying along the road to Pluto near Io.