Deimos is Mars' outer moon. It's a tiny, irregularly shaped moon and smaller than Mars' other moon, Phobos. Despite being unspectacular, Deimos remains a fascinating mystery. Deimos is one of only ...

As a result, an astronaut on Mars would see Phobos rising in the west and setting in the east. Deimos orbits Mars at an altitude of approximately 23,500 kilometres and has an orbital period of just ...

Mars' moon Phobos may actually be a comet — or at least part of one — that was gravitationally captured by the Red Planet long ago, a new preprint study based on previously unpublished photos ...

The Red Planet beckons us toward it, and the day draws closer when humans will walk on its dusty surface, and the moons of Mars, Phobos & Deimos, may be our gateway to that future. Novak Djokovic ...

Mars's moon Phobos is so strange that no one knows how it formed. But a forthcoming mission could solve this mystery - and a host of other puzzles connected to the solar system's deep past ...

Deimos, the smaller of the two moons, orbits Mars every 30 hours and is less than 10 miles across. Its larger sibling Phobos bears many scars, including craters and deep grooves running across its ...

"When people find out about that they're going to say 'who put that there?'," Buzz Aldrin once said of the monolith.

14.61 x 12.36 in. (37.1 x 31.4 cm.) ...

The Red Planet will be at its closest point to Earth, also known as perigee, on Jan. 12 and will be exactly opposite the sun on Jan. 15. It will be visible all night long because it will rise with the ...