It's possible that Mars' moons were originally asteroids that were captured by the planet's gravitational pull. There's also ...

Space exploration expands our knowledge of the cosmos, from planetary geology to the potential for life elsewhere ...

Phobos is such a close companion of Mars, about 60 times closer than the moon orbiting Earth, that it has crossed with MAVEN’s path multiple times a day during the orbiter’s mission.

The origin of Phobos and Deimos, the two Martian moons, has been a mystery to astronomers. These two bodies are a fraction of the size and mass of the Moon, measuring just 22.7 km (14 mi) and 12.6 ...

Phobos has the closest orbit of any known moon to its parent body, circling the red planet at a distance of just 6,000 kilometers (3,700 miles), about the same as the distance between Tokyo and ...

See stunning photos of Phobos and Deimos, the small moons of Mars, as seen by spacecraft on and orbiting the Red Planet. Phobos is the largest moon of Mars, with Deimos as a smaller satellite.

The moon's orbit brings it 6 feet closer to the red planet every century. Facts about the Martian moons Phobos and Deimos.

Mars is lucky enough to have two confirmed moons, and both have some scary names. Deimos, the smaller of the two moons, is named for the Roman god of dread. Phobos is larger, and its name comes ...

In the case of Mars' Phobos, the moon's size and shape ‒ roughly 17 miles long on its longest side ‒ make it impossible for it to completely cover the sun's disk.

Because Phobos is so close to Mars—3,700 miles, compared with the average 237,675 miles between Earth and its moon—there's significant pull between the two bodies, Hurford says. Mars "steals a ...

In the case of Phobos, the Martian moon's size and shape ‒ roughly 17 miles long on its longest side ‒ make it impossible for it to completely cover the sun's disk to create a total solar ...