Mercury moves super fast around the Sun, finishing its year in just 88 Earth days. The planet has crazy temperature swings, ...

Mercury is a mystery. It’s the smallest planet in our solar system, the closest to the Sun, and one of the most extreme. Its ...

Using data from NASA's MESSENGER spacecraft, scientists have determined that the solar system's tiniest planet, Mercury, hides a not-so-tiny secret: a 10-mile-thick mantle of diamond.

These record Mercury’s planetary contraction: Scientists estimate that the planet’s radius may have shrunk by as much as 4.4 miles (7 kilometers) since it formed. It is probably still ...

Scientists first predicted Mercury had a tail in the 1980s, and the tail was confirmed to exist in 2001, with more details having been learned by NASA's Messenger mission that orbited the planet ...

Using data from NASA's MESSENGER spacecraft, scientists have determined that the solar system's tiniest planet, Mercury, hides a not-so-tiny secret: a 10-mile-thick mantle of diamond.