There is but one Earth, tiny and fragile, and one must get 100,000 miles away to appreciate fully one's good fortune in living on it..

I knew I was alone in a way that no earthling has ever been before..

I really beleive that if the political leaders of the world could see their planet from a distance of, let's say 100,000 miles, their outlook wouls b….

Q: What were you thinking when your colleagues were out there making cosmic history? A: I just kept reminding myself that every single component in t….