Whether Mercury formed from a single collision or multiple impacts, the iron-rich planet is probably a rare breed.
The historic capsule that carried the second American to fly into space is set to land in the second most populous city in Kansas.
A joint European-Japanese mission to the tiniest planet, Mercury, blasted off from French Guiana on its long journey tonight (Oct. 19, Oct. 20 GMT).
Tiny Mercury is a strange planet that may hide secrets to how our solar system formed — and that's why the European and Japanese space agencies decided to build a pair of spacecraft to study it.
It's been more than 14 years since a spacecraft launched toward Mercury, so don't miss your chance to watch a rocket do just that.
The Saturn V rocket and its predecessors soar toward open space in the first of three new posters by Space.com celebrating landmark anniversaries in space history.
Mercury has been devoid of human-built companions since April 2015, and while the next spacecraft bound for the innermost planet launches in October, it won't arrive until 2025.
The planet Mercury will reach "half phase" tomorrow (Aug. 28) and will be visible early in the morning before dawn.
Why settle for a planet or two when you can catch all of them in just one night of intense skywatching?
A new estimate pegs the thickness of Mercury's crust at just 16 miles (22 kilometers) — nearly 30 percent thinner than previously thought.
While you're waiting to watch fireworks this Fourth of July, take a look up at the sky to spot Venus and other bright visible planets.
Tom Wolfe, who in 1979 chronicled the high-flying adventures of the first U.S. astronauts in his book "The Right Stuff," has died at the age of 88.