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September 18 - October 24, 2022
The farthest thing a normal-size human eye can reliably see is less than 3 million light-years away—the Andromeda galaxy, or the Triangulum galaxy if you have good vision and dark skies. That’s less than 0.01 percent of the distance to the edge of the observable universe.
a nanosecond is not very long—it’s enough time for light to travel almost exactly a foot.
