Add Yahoo as a preferred source to see more of our stories on Google. It's unlikely you'll be able to walk outside and see a line of planets, but according to NASA, a seven-planet parade happening ...

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 ...

Twin probes destined for Mercury were launched on Friday as a part of a joint mission by European and Japanese space agencies. An Ariane 5 rocket lifted the uncrewed spacecraft into orbit from French ...

For decades, Mercury has been seen as astatic, heavily cratered planet, a relic of early Solar System history. Its surface, scorched by the Sun and seemingly untouched by change, gave every appearance ...

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 ...

A nearby “super-Earth” is giving scientists a rare look at the bare surface of a distant world, and it’s far from Earth-like.