(neal.fun)

1773 points kaonwarb | 1 comments | 20 Oct 25 04:42 UTC | HN request time: 0.239s | source

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hshdhdhehd ◴[20 Oct 25 10:43 UTC] No.45642390[source]▶

Perfect. I think it just needs explanation of Karman line. Why is it 100km. What is the meaning?

1. tiborsaas ◴[20 Oct 25 10:51 UTC] No.45642448[source]▶

It's an arbitrary number, which is a good enough measure to distinguish an aircraft from a spacecraft.

Kármán said that it's about this height where the aerodynamic lift and inertia being dominant are reversed.

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