The Apollo 8 astronauts performed lunar orbit insertion #OTD in 1968.

Frank Borman, Jim Lovell, and Bill Anders became the first humans to orbit the moon, the first to see an earthrise, fifty five years ago today.

Anders spotted the Earth coming up over the Moon’s horizon:

"Oh my God, look at that picture over there! It's the Earth coming up. Wow, is that pretty!"

Image: NASA