On this day 54 years ago, the world was gifted with famed astrophysicist Neil deGrasse Tyson. Happy Birthday you magnificent bastard.

During the Gemini 4 mission on June 3, 1965, Ed White became the first American to conduct a spacewalk. The spacewalk started at 3:45 p.m. EDT on the third orbit when White opened the hatch and used the hand-held manuevering oxygen-jet gun to push himself out of the capsule.