Posted by Emily Lakdawalla on 2010/02/02 12:08 CST
For the first time ever, Mars Express' Visual Monitoring Camera has imaged the shadow of Mars' moon Phobos crossing the surface of Mars.
Posted by Emily Lakdawalla on 2009/12/11 11:24 CST
My inbox was exploding this morning with messages about a tremendously cool animation released this morning by ESA's Mars Express team. It shows Phobos crossing Deimos, in what's known as a "mutual event."
Posted by Emily Lakdawalla on 2009/11/18 04:58 CST
Posted by Emily Lakdawalla on 2006/02/07 11:00 CST
Saturn is surrounded by a crowded family of rings and moons, and two of those moons -- Epimetheus and Janus -- orbit Saturn so close together that it seems as though their different orbital speeds should make them crash into each other.