/sci/ - Science & Math

>>15114640
https://astronomy.com/news/2021/03/the-krmn-line-where-does-space-begin

Because its the actual criteria which meets the requirement of Karmen line (orbital forces exceeding aerodynamic ones), which was calculated by Andrew Gallagher Haley.

The actual 100 km is just a proposed guesstimate, the number stuck because its pretty, like 100 meters, 100 km, etc. The actual rule gives the exact number to ~52mile. So from physics standpoint, 50mile is the correct/accurate boundary as defined by the Karman line criteria.