NASA has posted a stunning photo of a "space potato" on social media — but it is actually Phobos, the Martian moon that is locked on a slow collision course with the Red Planet.
The space agency imaged the lumpy, starchy-looking moon using the High Resolution Imaging Science Experiment (HiRISE) camera on board NASA's Mars Reconnaissance Orbiter, which has been studying the Red Planet since arriving in its orbit in 2006.
