After a square structure found on the surface of Mars went viral on social media, internet users brought up another Martian ...

Formations that look like jumbo-sized kidney beans (or blobs of chocolate syrup, depending on your palette) may be indicators of whether Mars was habitable in the distant past.

DEADLY space radiation and rapid outbreaks of disease are just a few of the official Nasa dangers that visitors to Mars will face. The space agency holds a list of “five hazards of human ...

But a nearly full moon could interfere with viewing. It is unclear where the program to go back to the lunar surface will head ... Planet ended up with small Phobos and tiny Deimos.

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

No satellite could revolve in a shorter time than it takes its primary to rotate: this condition is violated by Phobos ... the more surface it exposes, and hence before accretion the mass picked ...

Meet Grace, the brave hopper robot that’s designed to jump into the darkest depths of the Moon, providing never-before-seen ...