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 ...

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 ...

Mercury, the smallest planet in our solar system, has many features that have puzzled scientists for a long time. For […] ...

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

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 ...