Science Friday Initiative
Science Friday: Spacecraft Records 'Chorus' of Space Sounds
What do Earth's radiation belts sound like? Wonder no more.
Science Friday Initiative
Science Friday: An Astronaut Explores Nasa's Scientific Frontiers
Learn how astronaut and astrophysicist John Grunsfeld leads NASA's investigations of Earth and beyond. This astronaut flown the space shuttle five times, and performed eight spacewalks to service the Hubble telescope. [23:32]