Mercury has long been considered a quiet, heavily cratered world, shaped mainly by time and exposure. That assumption began to change when NASA’s MESSENGER spacecraft sent back detailed images of the ...

Add Yahoo as a preferred source to see more of our stories on Google. Stargazers will soon have an opportunity to view six planets in alignment in the night sky, according to NASA. Mercury, Venus, ...

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 ...

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 ...

On April 18, Mercury, Mars, Saturn, and Neptune align in the sky, but it might be hard to Tennesseans to spot. Here is what ...

A year on Mercury lasts 88 Earth days, with a solar day (the time from noon to noon on the planet’s surface) lasting 176 ...

The “planet parade” happening all week will enter its most photogenic phase on Tuesday, Aug. 19, as Mercury becomes more prominent and the moon wanes to a slim crescent. All this week, four planets ...

Stargazers will soon have an opportunity to view six planets in alignment in the night sky, according to NASA. Mercury, Venus, Neptune, Saturn, Uranus and Jupiter will take part in a rare planetary ...