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 ...

Mercury has long been cast as the solar system’s burnt-out rock, a relic too small and too close to the Sun to hold many surprises. That caricature is now collapsing. New analysis of NASA’s MESSENGER ...

The Pleiades (top) and planet Mercury a little more than an hour after sunset yesterday April 26. Credit: Bob King See that little dot down in the trees? That's Mercury. In just a matter of days, it ...