NASA’s Messenger Spacecraft Detects a 10-Mile-Thick Layer of Diamonds on Mercury The innermost planet of our solar system, ...

61 years ago, humanity reached space for the second time with NASA 's Project Mercury. On the morning of May 5, 1961, naval aviator and test pilot Alan B. Shepard Jr. hopped onto the Freedom ...

Discovered in 1930, Pluto was long considered our Solar System's ninth planet, but was unseated in 2006 after the discovery ...