Rusty Schweickart Quotes
We have the capability - physically, technically - to protect the Earth from asteroid impacts. We are now able to very slightly and subtly reshape the solar system in order to enhance human survival.
Schweickart, Russell. "Deflecting a Killer Asteroid." TED, Mar. 2008.
We know that our solar system will die in several billion years, but there are also other comic dangers that in the past have wiped out most life species and could do so again. Hawking and some others believe that NASA and other future efforts to develop space travel are critical to the long term survival of the human race.
Russell Louis "Rusty" Schweickart is an American aeronautical engineer, and a former NASA astronaut, research scientist, U.S. Air Force fighter pilot, as well as a former business executive and government executive.