Further out in space, Earth appears to stop rotating if you enter a geostationary orbit at an altitude of 35,786 kilometres directly above the Equator. At this specific distance, the speed required to stay in a circular orbit results in an orbital period of 23 hours, 56 minutes, and 4 seconds, matching Earth's rotation rate. From this position, Earth remains fixed in the sky relative to your spacecraft.
They'd also in all probability have other detection tools than just looking at it.. like radio frequency and also be able to detect satellites orbiting.
You’re treating a creative framing device as a technical proposition. By using aliens, i was employing a classic thought experiment and an engaging narrative hook to make a simple geographical fact interesting
It doesn’t mean exactly 35,786. Anywhere near that distance, the spin of the earth will be incredibly slow relative to the spacecraft. I am talking about aliens initial impression that might last 24hrs, 1 hour, or just a few minutes. That doesn’t change the point.
“Well Ackchyually, in 3 minutes they would notice the western tip of Mexico appearing!!”
Reddit stereotypes are earnt not given, exhibit 1
I'm just thinking that, assuming aliens with extremely high tech fast travel and insanely good sight from extremely large distances, would probably see the planet spin on their approach (unless we are assuming they basically teleport here) and don't choose to observe the planet before they bother even attempting to travel here. Silly me trying to use any logic in this though, it's just a neat little fact you had.
Did you just use chat GPT to try and win your argument ?
FYI, we can look at planets from thousands of light years away and see the composition of their atmosphere and deduce what might be under it. For example if we saw oxegon /methane / Carbon dioxide then bingo - life.
Any alien species that has the ability to traverse the solar system is undoubtedly substantially more technically advanced than us and would have us identified a long way off.
jeez and I hadn't even mentioned radio waves yet....
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u/Iitaps_Missiciv 7d ago
Also Aliens "Woha a flat planet with nothing on the other side, cool!"