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BEYOND THE CRADLE — Human Spaceflight by Nation. Beyond the Cradle. In sixty four years, just over 700 human beings...
Pick a way to travel, from on foot to Voyager 1 to light itself, and watch how long the cosmos actually takes to cross, from the Moon next door to the nearest star. Real NASA and JPL distances, on a log or linear scale.
Personal Space Economy. Personal Space Economy
