Mercury has the shortest and fastest orbit around the Sun and experiences dramatic temperature changes as it rotates. It is a world of extremes. Explore facts about our solar system's fastest planet.

Here’s a look at human spaceflight programs in the United States and around the world. Facts The United States ended its crewed space shuttle program with the launch of Atlantis on July 8, 2011, and ...

March brings exciting celestial events for stargazers! Catch a glimpse of speedy Mercury as it becomes visible in the evening sky. Stay up late to witness a breathtaking total lunar eclipse, a ...

October 1, 1958 – The official start of NASA. October 7, 1958 – NASA announces Project Mercury. The Mercury project’s objectives are to place a human spacecraft into orbital flight around ...

As part of Project Mercury, NASA prepared to send a chimpanzee, Ham, into space to test the effects of space on a living creature. 8 Mind-Boggling Facts About the Octopus (03:59) What Is an Aurora?

Mercury ' s inner core is solid and about the same size as Earth ' s inner core, a new study using observations from NASA's MESSENGER mission has indicated. Mercury is the smallest planet in our ...