This frame from a movie clip shows the larger of Mars two moons, Phobos, passing in front of the smaller Martian moon, Deimos, as observed by NASA Mars rover Curiosity.
Two Moons Passing in the Martian Night
This frame from a movie clip shows the larger of Mars two moons, Phobos, passing in front of the smaller Martian moon, Deimos, as observed by NASA Mars rover Curiosity.