IO FROM GAL/LEO
spacecraft, now orbiting the giant planet. Galileo was 487 000 km from lo, and 908 000 km from Jupiter when this picture was taken in September 1996. It shows the side of lo which always faces away from the planet [Courtesy: NAWJPL].
lo, the most volcanic body in the solar system, is seen in front of Jupiter’s cloudy atmosphere in this image from NASA’s Galileo