Five faces of Phobos
Mars has two moons, Phobos and Deimos, and they are relatively tiny in comparison to our own natural satellite. Phobos is only 22 kilometres (14 miles) in diameter and, of the pair, orbits the closest to the Red Planet.
ESA’s Mars Express spacecraft was able to image Phobos in five different channels using its High Resolution Stereo Camera. The centre image used the nadir channel, the images to the left and right used two photometry pathways and the outer two shots used the stereo channels. These shots will allow astronomers to make improved models of Mars’ closest and largest satellite.