An overview of the history and accomplishments of NASA's Apollo missions.
The Perseverance rover, the centerpiece of NASA's Mars 2020 mission, will pick up where Curiosity left off, searching for signs of past life, but with better technology.
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.
There will be two solar eclipses in 2020: an annular, or "ring of fire" eclipse on June 21 and a total eclipse on Dec. 14. Here's everything you need to know about this year's solar eclipses.
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.