On Tuesday, June 17, 2025 at 6:57:42 AM UTC-6 Alan Grayson wrote:
On Tuesday, June 17, 2025 at 5:41:50 AM UTC-6 John Clark wrote: On Tue, Jun 17, 2025 at 3:09 AM Alan Grayson <[email protected]> wrote: *If you are in freefall then you experience no gravity, so from your perspective your local spacetime is flat and things move in a path that is the shortest distance between two points, a Euclidean straight line.* *Really? The astronauts in the SS are free-falling in the Earth's gravity field and their path is not a straight line. AG* *No force is being applied to the space station but it is not following a Euclidean straight line because it is not in flat Euclidean space, it is in curved 4D non-Euclidean spacetime and is following a geodesic path. In curved 4D non-Euclidean spacetime the shortest path between any two points along the space station's orbit is the space station's orbit itself. * *John K Clark See what's on my new list at Extropolis <https://groups.google.com/g/extropolis>* OK, but then your previous comment, to which I responded, is false. AG Earlier you wrote that free falling in a gravity is like falling, or moving along a straight line as in a flat Euclidean space, but the SS is free falling in a gravity field and traveling in a curved path around the Earth. Can't you just acknowledge your error? AG Ill -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/everything-list/23dcfcde-6db8-4eb3-b2af-bab5f98a22e9n%40googlegroups.com.
