500 miles altitude is 440 miles beyond the Karman line of 100 kilometers altitude
Space legally.
Space
Where does it really start
Beyond the Oort cloud maybe ....that’s a long way....we have probes nearing there but we’ll have lost touch with them by then
wardaddy,
It does not really matter where “space” starts. The important point is that there is nothing to “orbit.”
The earth is flat. Water on its surface does not curve. You can use a laser to verify that claim.
With no curve, there is nothing to “orbit.”