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navigation/position markers on helicopters, or some kind of sUAS, probably. If it's dark enough, you won't see the aircraft itself, especially at a distance, unless it occludes something lit behind it, and helicopters can move in ways you wouldn't necessarily expect. (for example, these are full-collective RC helicopters. The only reasons we don't see full sized birds doing that are the power to weight ratio, human limitations and... the unfortunately boring question of "why")
edit to add: here's the Wildcats demo team, they're a UK based acrobatics team flying. The tictocs, inverted flying, etc, are things you see in rc heli 3d flying; a consequence of the ridiculous power to weight ratio and being able to adjust the throw on the swashplate so that the blades can go "negative pitch" (relative to the aircraft, the rotors would be pushing down instead of up. there's no reason to do that on a full scale bird; besides making passengers vomit. Which is easy enough to do anyhow. Wildcats love taking fighter pilots up...)
ETA2: the UK Chinook demo team, too
I don't think you realize how big space is.
Space is big. I mean, really really big. You may think it's a long walk down the street to the chemist's, but that's just peanuts to space.
I do, actually. I'm just ignoring that discussion because it usually gets eyes to gloss over. (edit, and there's a lot of handwavium that even JJ Abrams could be proud of there.)
So I'm going with the "would you want to visit a psychotic species that has nuked itself hundreds of times?" (only 2 were done in anger, but there were more than 500 atmospheric tests. Thousands of underground/sea tests, as well.)
Also, for clarification, I'm saying they're seeing human-made aircraft, either helicopters or sUAS's performing in ways that people who aren't quite as familiar wouldn't expect. if you can't see the aircraft body and just guess off navigation markers, you can wind up with some rather wild assumptions.
That’s a relative statement.
And you're a relative badger.
That’s Honey Badger to you.
That is one of the only cases where discussing size is not relative actually. Space is always big. It's big compared to a person, it's big compared to a planet, it's big compared to a star system, it's big compared to a galaxy, it's big compared to a galactic cluster, and it's approximately equal in size to the universe.
My comment was a humorous play on words, especially if understood in the context of physics and the theory of relativity, which deals with the fabric of space and time. In this context, I’m making a joke about the concept of “big” being relative in the vast and complex expanse of the universe.
That's like a spastic dragon fly.
TBH as an RC heli pilot I am no where near that skilled. I can manage to not crash and maybe get inverted a bit and do some funnels, maybe a few ticktocks by accident (where the rotor goes mostly on edge and pounces between slightly not-inverted and slightly inverted)
these guys are phenomenal.
Mostly, I like building whacky things, or like, scale models of sci-fi ships, and doing my best to hide the rotors and stuff. one of my favorites is Klatu's ship from the 1950's version of the Day the Earth Stood Still. I may have fucked around with a cop that was "Catching up on his reports" (aka napping).