It was a texture. The blackness was so intense.

Charles Duke, Astronaut, Apollo 16



Teach me your mood,
O patient stars.
Who climb each night,
the ancient sky.
leaving on space no shade, no scars,
no trace of age, no fear to die.

Ralph Waldo Emerson, from The Poet



You keep returning to the thought that only very thin walls separate you from the deathly cold and incomprehensible emptiness of space.

Oleg Makarov, cosmonaut, Life magazine, November 1988



The cosmos is all that is or ever was or ever will be. Our feeblest contemplations of the Cosmos stir us—there is a tingling in the spine, a catch in the voice, a faint sensation, as if a distant memory, or falling from a height.

Carl Sagan



As you pass from sunlight into darkness and back again every hour and a half, you become startlingly aware how artificial are thousands of boundaries we’ve created to separate and define.

Russell ‘Rusty’ Schweikart, returning from Apollo 9



Previously:

On Doppelgangers

On Language

On Madness