Epiphany: In Space There Is No Sideways

Earthrise, Apollo 8
December 29, 1968

From Great Images in NASA:
"This view of the rising Earth greeted the Apollo 8 astronauts as they came from behind the Moon.... The photo is displayed here in its original orientation...."

I love stuff that knocks me sideways (gently)--like this reminder that "up and down" are strictly local concepts, serving our specific biology.
It helps me somersault more lightly through inner space.