Mars Express radar gives strong evidence for former Mars ocean Scientists chart high-precision map of Milky Way's magnetic fields Classic portrait of a barred spiral galaxy The art of recycling pulsars Hubble zooms in on a magnified galaxy NASA spacecraft returns first video from farside of the Moon The week in pictures: January 28–February 3, 2012 New super-Earth detected within the habitable zone of a nearby cool star Remnant of an explosion with a powerful kick? NASA spacecraft reveals new observations of interstellar matter A pocket of star formation "Cool" gas may form and strengthen sunspots New study may answer long-standing questions about enigmatic Little Ice Age Curiosity instrument measures radiation from solar storm Space weather center to add world's first "ensemble forecasting" capability The week in pictures: January 21–27, 2012 NASA's Kepler announces 11 planetary systems hosting 26 planets NASA's NuSTAR ships to Vandenberg for March 14 launch