NASA has only flown astronauts aboard a rocket's first flight once, when John Young and Bob Crippen took space shuttle Columbia on the boldest test flight in history. What are the risks of repeating the feat for SLS?
Today, NASA announced progress on a spacecraft that would assess whether Jupiter's Moon Europa is habitable, and earlier this month, an agency-sponsored science team released a report on a separate lander mission that would directly search for signs of life.
Planetary Society CEO Bill Nye and LightSail systems engineer Barbara Plante recently traveled to Japan for a solar sailing symposium. Our Q&A with Plante discusses everything from CubeSat attitude control systems to robotic giraffes in Tokyo.