Living up to its name, Mercury is the fastest planet in the solar system, speeding along at about 29 miles per second and ...

Astronomers propose a new hypothetical planet, Planet Y, beyond Neptune, based on observed orbital anomalies in the Kuiper ...

Recent research indicates Mercury, the solar system's smallest planet, is shrinking due to its cooling interior. As Mercury's ...

A new study has used an alternative method to work out how much Mercury has shrunk since its formation, finding that the ...

Since its fiery birth nearly 4.5 billion years ago, Mercury, the smallest planet in our solar system, has been slowly ...

Mercury, the smallest planet in our solar system, has a magnetic field that has intrigued scientists for decades. Recent ...

Mercury, the smallest planet in the solar system, has spent billions of years quietly getting even smaller. Since its fiery ...

Kenna Hughes-Castleberry is the Content Manager at Space.com. Formerly, she was the Science Communicator at JILA, a physics ...

Mercury, the smallest planet in our solar system, has shrunk by 11 kilometres since its formation and continues to contract, ...

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.

Greatest elongation is the ideal time to spot Mercury during its morning appearance. Even then, it won't climb very high. For ...

Earth is so far the only known planet on which life exists—with liquid water and a stable atmosphere. However, the conditions ...