Although Mercury was geologically active in its early days, today its surface appears almost completely static. This is why ...

NASA's Mercury-orbiting spacecraft, Messenger, is going out with a bang this week, adding a hefty crater to the little planet closest to the sun. The first spacecraft to circle Mercury, Messenger is ...

CAPE CANAVERAL, Fla. (AP) – The only spacecraft ever to orbit Mercury ended its four-year tour with a crash landing Thursday. NASA’s Messenger plunged from orbit as planned and slammed into the sun’s ...

Mercury has always been a bit of an oddball planet. With about half the mass of Mars but roughly the size of the Moon, and a ...

Mercury is a mysterious world. As the closest planet to the sun, it’s a hard-to-reach destination for space missions. So far, only two have made it to Mercury—NASA’s Mariner 10 and MESSENGER ...

NASA's hardest working probe has finally run out of fuel, and will meet a tragic fate as it crashes into the planet Mercury on April 30. See the amazing photos this probe shared with us in its very ...

NASA and the USGS created a topographic map of the closest planet to the sun. It's a view of Mercury that no one has ever seen before. They did it by using more than 100,000 pictures taken from NASA's ...