There is beauty in space, and it is orderly. There is no weather, and there is regularity. It is predictable. Just look at our little Explorer; you can set your clock by it—literally; it is more accurate than your clock. Everything in space obeys the laws of physics. If you know these laws, and obey them, space will treat you kindly.
— Wernher von Braun, quoted in ‘Space: Reach for the Stars’, Time magazine, 17 feburary 1958