It's been 40 years since we first saw Mercury up close, and the flyby raised more questions than it answered.
An obsolete theory of the Earth works better than ever on Mercury, where new data reveals how much the hot little planet has shriveled since it first formed.
As we say goodby to NASA astronaut Scott Carpenter who died this week at the age of 88, take a look back at his historic Project Mercury spaceflight in 1962.
Scott Carpenter, who became the second US astronaut to orbit the Earth in 1962, died Thursday in Colorado aged 88.
NASA's MESSENGER probe has been in orbit around Mercury since 2011 and has returned photos of some really strange looking objects.
On Friday, Saturn won't be the only planet that will get photobombed by Earth; the MESSENGER spacecraft will also be taking pictures from the other end of the solar system. Continue reading →
If the United States had managed to put the first man in space, the course of spaceflight would have been very different. Continue reading →
A puzzling meteorite with unknown origins: It could be from the surface of Mercury, but something doesn't quite add up. ->
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