... Tonight's Sky . ... Observing . ... Supernova showered Earth with radioactive debris . ... solar system . ... Astronomy for Kids . ... A satellite in limbo . ... Today, though, NASA's Imager for Magnetopause-to-Aurora Global Exploration (IMAGE) satellite orbits Earth as unresponsive as a frozen desktop computer. ... Only registered members of Astronomy.com are allowed to comment on this article. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email...