This image from a movie clip shows Phobos, the larger of the two moons of Mars, passing in front of the other Martian moon, Deimos, on Aug. 1, from the perspective of NASA Mars rover Curiosity.
Smoothed Movie of Phobos Passing Deimos in Martian Sky
This image from a movie clip shows Phobos, the larger of the two moons of Mars, passing in front of the other Martian moon, Deimos, on Aug. 1, from the perspective of NASA Mars rover Curiosity.