s anybody else out there? For as long as humans have recognized Earth as but one planet in a vast, orb-speckled universe, we have pondered the mystery of extraterrestrial life.
After Nicolaus Copernicus introduced heliocentric theory to 16th century Europe, astronomers began to dream about “other worlds” — and populate them with imaginary creatures. Pioneering astronomers such as Johannes Kepler (father of planetary motion) and William Herschel (discoverer of Uranus) believed in the existence of alien life. Peering through his telescope, Herschel thought he spied towns and forests on the lunar surface.
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