50 yrs since first US Earth orbit
21 February 2012 Last updated at 14:24 GMT
The US space agency, Nasa, is celebrating 50 years since the first orbit of the Earth by an American.
John Glenn piloted the space capsule Friendship 7 into orbit on 20 February 1962.
He then circled the globe three times in five hours.
The former astronaut, who's now 90, celebrated the anniversary by chatting to the crew currently on the International Space Station, a science laboratory floating in space.