Mercury has long been cast as the solar system’s burnt-out rock, a relic too small and too close to the Sun to hold many surprises. That caricature is now collapsing. New analysis of NASA’s MESSENGER ...

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 ...

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 ...

(PhysOrg.com) -- MESSENGER scientists will highlight the latest results on Mercury from MESSENGER observations obtained during the first six months (the first Mercury solar day) in orbit. These ...

Right: Mercury Magnetospheric Orbiter Mio of the BepiColombo mission; Left: Earth’s GEOTAIL satellite. The illustration highlights comparative studies of planetary magnetospheres. An international ...