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 ...

For a week now, excited astronomers have been looking at close-up images of Mercury, where temperatures range from 800° to -300°. Is it possible that the planet closest to the Sun has deposits of ...

The planet Mercury is the closest planet to the sun, and also the most difficult for spacecraft to visit and explore. This is because as spacecraft get closer to Mercury, the sun's enormous gravity ...