NASA has spin-offs, and it's a huge and very impressive list, including accurate and affordable LASIK eye surgery.
Neil deGrasse TysonTo believe in a universe as young as 6 or 7,000 years old is to extinguish the light from most of the galaxy.
Neil deGrasse TysonWe account for all the matter and energy that we're familiar with, measure up how much gravity it should have, it's one-sixth of the gravity that's actually operating on the universe. We call that dark matter. It really should be called dark gravity. We don't know what that is.
Neil deGrasse TysonI'm not writing for myself. I'm writing as an educator, I'm writing to stimulate others.
Neil deGrasse Tyson