physicsoftheuniverse.com

1Djd TIL scientists believed that during the Inflationary Epoch, roughly 10^-36 seconds after the Big Bang, the universe expanded by a factor of at least 10^26 — 100,000,000,000,000,000,000,000,000, becoming the size of a grapefruit.
OlPR TIL that if you travel at 99% the speed of light away from the sun, the light from the sun would still pass by you at the speed of light relative to you.
bnL0 TIL: The big bang theory was first proposed by a catholic priest.