"Thanks for all your effort," wrote the first moonwalker. Neil Armstrong was appreciative, but as explained in his ...

Using data from NASA's MESSENGER spacecraft ... and the premature end of Mercury's volcanic era. Also among these puzzles are ...

Nicole Stott is the latest astronaut to lend her autograph to the Space Hipsters Signature Edition series of "signed" patches. A former NASA astronaut who has made it her mission to promote the ...

As planets go, Mercury is a world of extremes – and one ... work as a co-investigator with Europe and Japan’s BepiColombo mission, which last week made its final and closest flyby of Mercury ...

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 ...