Bill Nye explains the threats that different sizes of asteroids can pose to life on Earth, how we can detect them, and ways that we can protect Earth from those asteroids. (7:07 min.) Learn more about asteroids at http://www.space.com/51-asteroids-formation-discovery-and-exploration.html.
Learn about the electromagnetic field of the Earth and what it means to us in this Backgrounder.
How do you test a giant parachute designed to land a rover on Mars? This NASA test involved a helicopter, a one-kilometer-long rope, and a rocket sled!
Tapes of mankind's first lunar landing misplaced?
On December 2, 2010, NASA held a press conference to “discuss an astrobiology finding that will impact the search for evidence of extraterrestrial life”. The announcement was important and revolutionary, redefining the chemical definition of life.
Most people wouldn’t guess that rocket scientists sometimes fail to catch silly mistakes, especially because it matters. But they do, and have lost machines that cost more than your average Hollywood blockbuster.
Exploring deeper into space will mean addressing the problems posed by space radiation and microgravity.
In the future, space travel could rely on energy sources such as nuclear fission, fusion, and matter-anti-matter annihilation.