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. An image of Mercury made with Blender with data from NASA and the USGS (Wikideas1) It’s a world where the Sun stops in the sky at ...

Mercury's barren surface has led to the planet being labeled as "dead," but signs of geological activity say otherwise. Bright streaks known as "lineae," which can be seen on slopes across the planet, ...