Jonathan Homan, Project Manager for Webb's Chamber A Testing, talks about how the James Webb Space Telescope has been designed, built, and tested, especially in the vacuum chamber here at the Johnson Space Center. He also describes what...

NASA's Les Johnson discusses solar sail propulsion and the upcoming Near-Earth Asteroid Scout and Solar Cruiser missions.

Retired NASA astronaut John Grunsfeld hosts this six-part mini-series about the tools used on the Hubble Space Telescope servicing missions. Hubble was uniquely designed to be serviced in space so that components could be...