Neil deGrasse Tyson Quotes:
Ocupation: Astrophysicist
Life: b. October 5, 1958
Birthday: October 5
We 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.
topic: Dark, Matter, Energy, Matter And Energy, Dark Matter
