Northrop Grumman Space Systems brings together decades of work by pervious companies in the aerospace industry.
A look at the U.S. Air Force's unmanned X-37B space plane, which has flown four secret, long-duration missions in Earth orbit to date.
Since launch in 1990, the Hubble Space Telescope (HST) has provided amazing images that have led to discoveries. Explore Hubble's history and facts.
Star charts show the arrangement of stars in the sky, in a style that can be scientific, artistic or both, depending on the intended use.
Fred Haise is an ex-NASA astronaut most famous for his role as the lunar module pilot on the nearly-disastrous Apollo 13 mission.
Jack Swigert was an expert pilot and NASA astronaut most famous for his role as command module pilot for Apollo 13.