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A comment on Longest Lines of Sight on Earth. Parent comment

Re:Longest Lines of Sight on Earth by tromp on Thursday July 27, 2017 @06:17AM (#14863973)
As the article explains, these points are about sqrt(2Rh) = sqrt(2 x 6400km x 0.3m) = sqrt(3840000m^2) ~ 1.96km away from the cat.
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Re:Longest Lines of Sight on Earth by davidmanescu on Thursday July 27, 2017 @06:30AM (#14864023)
Did a back of the envelope trigonometry calculation as an approximation, seems to check out :)
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