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I thought I remembered reading someplace respectable that the apparent curvature of the earth as seen from the surface or planes is actually just perspective, a
by raldi 2y ago
I thought I remembered reading someplace respectable that the apparent curvature of the earth as seen from the surface or planes is actually just perspective, and would look indiscernible on a flat planet (or a huge one). But I don’t have a citation to share. Maybe it’s only true at sea level.
- loloquwowndueo 2y agoI wonder where you read that because it sounds like a very flat earther thing to say.
- raldi 2y ago“Visual daytime observations show that the minimum altitude at which curvature of the horizon can be detected is at or slightly below 35,000 ft, …Photographs purporting to show the curvature of the Earth are always suspect because virtually all camera lenses project an image that suffers from barrel distortion” https://opg.optica.org/ao/abstract.cfm?uri=ao-47-34-H39 https://opg.optica.org/ao/abstract.cfm?uri=ao-47-34-H39 Another trick you can do: take this Concorde photo and use the rules of geometry to draw the rest of the circle, and look how small an Earth you’ve drawn.
- saagarjha 2y agoConcorde flies higher than 35000 feet.
- AnarchismIsCool 2y agoIME the curvature isn't really discernible until far higher altitudes. Most of the "curve of the earth" shots you see are because someone stuck a go-pro on a hiball and a combination of haze and fisheye effect makes the earth look round. If you use a camera without the lens distortion it just looks like a normal horizon.