On the martian surface, would the moons Deimos and Phobos be visible to the unaided eye? David De RooSilver Spring, Maryland ...

Previously unpublished photos of Mars' moon Phobos hint that the mysterious satellite may actually be a trapped comet — or perhaps just a piece of one, along with its twin moon Deimos. When you ...

"It's the first time an image of the two celestial bodies have been captured together from the surface of Mars." When you purchase through links on our site, we may earn an affiliate commission.

Phobos is the larger and innermost of Mars' two moons, and it's a fascinating celestial body. It's small, irregularly shaped, and orbiting just about 6,000 kilometers above the surface of the Red ...

A recent discovery suggests Mars may have once had a much larger moon, which could have caused tides in a lake that once filled Gale Crater. This intriguing possibility comes from a study of sediment ...

Add Yahoo as a preferred source to see more of our stories on Google. On January 29, 1989, a Soviet space probe named Phobos 2 arrived in orbit around Mars. This was the last space mission launched by ...

Six planets in the solar system have at least one moon. Both Earth and Mars are toward the lower end of the lunar count, as our home planet only has one moon, and Mars has two. But not all moons share ...