An astronomer is suggesting that Mars once had a large moon that exerted enough force to create a large bulge on its surface.

NASA’s Curiosity rover achieved a historic milestone by capturing the first-ever image of Earth alongside Phobos, one of Mars ...

An incredible photo shows Earth photobombing Mars' moon Phobos. It is the first time ever the two have been captured together ...

An incredible photo shows Earth photobombing Mars' moon Phobos. It is the first time ever the two have been captured together ...

We are all familiar with our one Moon but other planets have different numbers of moons; Mercury has none, Jupiter has 95 and ...

A third Martian moon around a third the size of our own could explain the anomaly. Mars's current satellites Phobos and ...

In a groundbreaking achievement, NASA’s Curiosity rover has captured an awe-inspiring view from the surface of Mars, marking ...

A Mars scientist shares the inside story of the NASA Curiosity rover's poignant first photo of Earth and Mars moon Phobos ...

NASA's Curiosity rover has captured a spectacular sight from the surface of Mars: The first-ever photo of Earth alongside the ...

The rings of Saturn are among the most famous and spectacular features in the solar system. Earth may once have had something similar.

That was the 4,295th Martian day that Curiosity has spent on Mars. It is believed that Phobos, or part of it, might in the ...