CAPE CANAVERAL, Fla. (AP) – The only spacecraft ever to orbit Mercury ended its four-year tour with a crash landing Thursday. NASA’s Messenger plunged from orbit as planned and slammed into the sun’s ...

Tohoku University (Japan), LPP (France), and partners has demonstrated that chorus emissions, natural electromagnetic waves ...

Calling its journey "as close to perfect as you can get, NASA announced its Messenger spacecraft has reached Mercury and is orbiting as close as 124 miles above the solar system's innermost planet.

Turns out, it's as tough to drop inward into the inner solar system, as it is to head outward. The problem stems from losing momentum from a launch starting point on Earth. It can take missions ...

A collision with an asteroid might have set the planet Mercury whirling oddly in its orbit, a new study suggests. When one body orbits another — say, a moon around a planet or a planet around a star — ...

An international team from Kanazawa University (Japan), Tohoku University (Japan), LPP (France), and partners has ...