NASA's Mercury-orbiting spacecraft, Messenger, is going out with a bang this week, adding a hefty crater to the little planet closest to the sun. The first spacecraft to circle Mercury, Messenger is ...

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 ...

BERLIN — A spacecraft bound for Mercury has swung by Venus, using Earth’s neighbor to adjust its course on the way to the solar system’s smallest and innermost planet. Launched almost two years ago, ...

Pieces of Mercury may have been found on Earth, potentially allowing scientists to study the Solar System's innermost planet. While we have sent two spacecraft to Mercury – Mariner 10 and MESSENGER – ...

Plume of gas ejected from Mercury’s atmosphere extended to form a comet-like tail, which was captured by the astrophotographer.

Despite being relatively close to us, planet Mercury is one of the least studied places in this solar system. At first, our species ignored it because the conditions there, so close to the Sun, are ...