Is the Best Time to Spot Mercury . In the early morning, Mercury will rise before the Sun and hang low in the east close to the horizon as the dawn sky slowly brighte ...

This model projects what the northern pole of Mercury may look like. The planet's vertical ... The thin atmosphere, or exosphere, does little to prevent or slow down impacts from extraterrestrial ...

MIT astronomers have discovered a planet some 140 light-years from Earth that is rapidly crumbling to pieces.The ...