ESA's Mars Express orbiter captured footage of the Mars' moon Deimos pass in front of Ganymede, Europa, Jupiter, Io and ...

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

Stargazers in the U.S. will find the slender form of the crescent moon roughly 20 degrees above the western horizon right at ...

The Buck Moon rises on July 10. The full moon of July, also called the Buck Moon, will rise on July 10.

These days, our neighbor Mars has just two moons: Phobos and Deimos. But according to a study published Monday in the journal Nature Geoscience, these little satellites may actually be the planet ...

Mars is the darling of many planetary scientists, who continue to visit it through increasingly advanced robotic explorers. But don’t forget that our planetary neighbor is adorned with two moons ...

These days, our neighbor Mars has just two moons: Phobos and Deimos. But according to a study published Monday in the journal Nature Geoscience, these little satellites may actually be the planet ...

The moons’ small size and quirky dimensions led to suggestions that they may be asteroids captured by Mars long ago. Not so, say researchers analyzing data recorded by Hope, which entered orbit ...

Although both moons orbit Mars much closer than our own Moon orbits Earth, they also are very small: Phobos measures only 12 miles (19 kilometers) across and Deimos is half that.