"I see how incomprehensible things are, but I'm comfortable with unanswered questions. It's not productive to try and figure out what's behind the order of the universe. You just have to cope with the unknown; the answers will unfold on their own terms." —Buzz Aldrin, Apollo 11 astronaut who walked on the moon. Happy birthday, Buzz! @drbuzzaldrin . . . . . #spacetime #cosmos #cosmology #astronomy #astronomer #hubbletelescope #spacetravel #nasabeyond #spacestation #spaceexploration #solarsystem #spaceiscool #nasainsight #internationalspacestation #marsrover #buzzaldrin #moon #moonlanding #earthfromspace #nasagov #astronaut