Watch live on October 25: Defending Earth from asteroids with Neil Tyson
Friday, October 25, 2013 - 04:00
in Astronomy & Space
Hundreds of thousands of asteroids orbit the Sun, and a very few have a high risk of striking Earth. But a direct hit can be devastating, as evidenced by the explosion over Chelyabinsk, Russia, this February of a meteor no larger than a small barn, which injured more than 1,000 people.