A companion to yesterday’s gif: Deimos (small) and Phobos (large), photographed by Mars Express, 9 August 2011.  Whereas yesterday’s post showed a mutual event with these two moons in full phase, here they are crescents.

A companion to yesterday’s gif: Deimos (small) and Phobos (large), photographed by Mars Express, 9 August 2011.  Whereas yesterday’s post showed a mutual event with these two moons in full phase, here they are crescents.