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slavmememachine t1_j65pngt wrote on January 27, 2023 at 10:08 PM

Reply to comment by Raving_Lunatic69 in ELI5: How do we define the boundary between earth’s atmosphere and space? by crenshawcrane

I believe they say it’s 100 km because some guy named karman figured out that you would need to be moving at orbital speeds to generate enough lift and it was around 100 km