The secrets of Mercury's strange magnetic bubble are gradually being unlocked by the BepiColombo spacecraft as it makes its rapid flybys of the world.

The main working hypothesis for the Mercury problem says that the planet is the victim of a collision with a different-sized object. The cataclysmic collision stripped much of the planet's mantle and ...

Isaac Asimov (1920-1992), a legendary writer of science and science fiction, once noted in "The Solar System and Back," that the planet Mercury is rarely visible when it is truly dark. "I suspect, in ...