Mercury may be the closest planet to the Sun, but it's long been overshadowed in scientific exploration. With only two missions ever reaching it - most recently NASA's MESSENGER - the planet remained ...

NASA’s Messenger Spacecraft Detects a 10-Mile-Thick Layer of Diamonds on Mercury The innermost planet of our solar system, Mercury, is barely wider than the continental United States, and is often ...

The solar system's smallest planet is quickly approaching superior conjunction, so catch it in the morning sky while you can.

A U.S. spacecraft beamed hundreds of photos of Mercury back to Earth on Tuesday after a close encounter with the planet closest to the sun. The images show scientists never-before-seen landscapes on ...

We were doing the typical planet vetting, and I happened to spot this signal that appeared very unusual.” An orbiting ...

What is the hottest planet in the solar system? If you want to know which is the hottest star in the solar system, this ...

Discover the planet that has the most moons. This planet is a ringed giant and the second largest in the solar system.

With Mercury in the mix, the planet of communication ... This rare conjunction could push us to think differently, see beyond the surface and access a more intuitive, creative state of mind.