Mercury has long been cast as the solar system’s burnout case, a small rocky world that cooled quickly and then froze in ...

Mercury, the closest planet to the sun, is only slightly larger than Earth's moon and is pockmarked with craters. The planet is visible to the unaided eye and as such as has long been known to humans.

Far smaller and closer to the Sun than it should be, Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission arriving in 2026 might ...

Add Yahoo as a preferred source to see more of our stories on Google. Three views of Mercury taken by the European BepiColombo mission during its flyby of the planet in June 2023. Europe's ...