Jupiter and its moon Io

This NASA montage of images of Jupiter and its volcanic moon Io, was taken by the New Horizons spacecraft's flyby in early 2007.

The Jupiter image is an infrared color composite taken by the spacecraft's near-infrared imaging spectrometer on Feb. 28, 2007.

The Io image, taken on March 1, 2007, is a nearly true-color composite. The image shows a major eruption in progress on Io's night side, at the northern volcano Tvashtar.