A vast and powerful space weather event has been observed at the solar system's innermost planet for the first time. Continue reading →
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.
NASA's MESSENGER probe has been in orbit around Mercury since 2011 and has returned photos of some really strange looking objects.
NASA's MESSENGER mission is turning up more questions than answers as it photographs strange recently-formed features on Mercury's surface.