ESA's Rosetta probe just flew by Mars en route to a deep space rendezvous with Comet 67P/Churyumov-Gerasimenko. During the 200 km close flyby, the Rosetta's Philae Lander camera got this lovely view of the craft's solar panel backdropped by the Martian arc, plus an animation of the moon Phobos' shadow on the Martian surface, and more lovely Mars imagery.
Two Moons Passing in the Night. Mars rover Spirit took these sequential photos of Martian moons Phobos and Deimos passing overhead in the night sky. Those rovers are still going strong!
Old Mars and the Sea. A salty sea may once have covered the Opportunity rover's landing site on Mars, boosting the possibility that the planet may once have evolved life. (Of course, there are those who believe NASA has been conspiring to cover it all up, but the Bad Astronomer has words on that. Bunnies and faces, my foot.)
Meanwhile, on Mars, The Spirit rover has reached Bonneville Crater, a primary mission objective, and snapped photos of the far side of the crater rim with its navcam. But what is that glint to the left side? (more within)
NASA and the Mars Bunny. I first heard about it from our own kokogiak. Then the conspiracy theorists: "They're destroying the evidence!" But now NASA has come out to tell us, "It's probably just airbag material."