Mercury is a planet that just doesn't make sense. It's incredibly small yet hosts a relatively massive core. Mercury is so strange that astronomers have not been able to explain its properties with ...

For decades, Mercury has been seen as astatic, heavily cratered planet, a relic of early Solar System history. Its surface, ...

A layer of diamonds up to 18 kilometers (11 miles) thick could be tucked below the surface of Mercury, the solar system's smallest planet and the closest to the sun, according to new research. The ...

The team found that the lineae occurred preferentially on the Sun-facing slopes of the younger impact craters. This suggests ...

Home to magnetic tornadoes and 800-degree temperatures, Mercury is visible at dusk through mid-month. The Full Pink Moon also joins the scene on April 5. Mercury shows phases like the moon because it ...

How do you explore the interior of a planet without ever touching down on it? Start by watching the way the planet spins, then measure how your spacecraft orbits it — very, very carefully. This is ...