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Parallax and the Eighteenth Century Space Race
In the late 16 hundreds, astronomer edmund hayley. proposed we used parallax, this ee thumb distant object trick, to unlock the mystery of distances in outer space. All youve got to do is make venus your thumb, substitute two points on earth for your eyeballs, and finally, swap that background object for the sun. And wallo, that is what it's the paralax is this change of position with respect to background objects of whatever you're looking again.