The Lyrid meteor shower has been observed for more than 2,700 years.
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.
With supersonic wind tunnels, giant vacuum chambers, engine test stands and a deep shaft for dropping test packages, NASA's Glenn Research Center puts air and space hardware to the test.
The James Webb Space Telescope, WFIRST, Hubble, and hundreds of other missions sprang from or have close connections to NASA's Goddard Space Flight Center.