“The time was fast approaching when Earth, like all mothers, must say farewell to her children.” ― Arthur C. Clarke

“The Earth is the cradle of humanity, but mankind cannot stay in the cradle forever.” ― Konstantin Tsiolkovsky

“There were only the great diamonds and sapphires and emerald mists and velvet inks of space, with God’s voice mingling among the crystal fires.” ― Ray Bradbury

"If offered a seat on a rocket ship, don't ask what seat. Just get on." — Christa McAuliffe

“I suppose the one quality in an astronaut more powerful than any other is curiosity. They have to get someplace nobody’s ever been.” — John Glenn