Watch for the two moons of Mars, Phobos (larger) and Deimos (smaller), in this view of the red planet rotating on its axis. One rotation--a Martian day--takes 24 hours and 40 minutes. More than a dozen missions have gone to Mars: unmanned spacecraft that have flown by, orbited and even landed on the red planet. Data from these spacecraft allow us to image our close neighbor in tremendous detail.

See Mars in 3D