One summer night in 1877, American astronomer Asaph Hall was looking through his telescope in Washington, D.C. Mars was at ...

Of Mars’s two moons, Phobos is slightly larger. Both are irregularly shaped, like potatoes. Phobos is about 27 km across on its longest side, and Deimos is 15 km across.

A new study challenges the long-standing assumptions about the origin of Mars’s moons by suggesting the Red Planet may have once been surrounded by rings. The research, authored by Matija Ćuk, Kaustub ...

Mars' two moons, Phobos and Deimos, are small, irregular, but orbit in the same equatorial plane as the red planet. Although they've long been thought to be captured asteroids, those orbits would ...

Scientists believe that Phobos, one of Mars' two moons, is destined to be torn to shreds and form a ring around the Red Planet, and if so, it might be a fitting callback to how it got there in the ...

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 ...

Mars has two irregularly shaped moons, and neither is mighty. Phobos, the larger of the two, is about 17 miles in diameter at its widest, and orbits closer to the red planet at an altitude of ...

NASA shared timelapses on X of Mars' two moons completely separate transits of the sun in preparation for today's North American total solar eclipse.

While on a flyby of Mars, Hera was able to use three of its imaging instruments to capture images of Deimos, the smaller of Mars' two moons, the ESA said. Deimos is about 15,000 miles from Mars.

You may like Mars rises over the moon's horizon at the best possible time; Two stunning conjunctions will light up the sky later this month. Here's how to view them.