
I had to Google this: planetesimal. Learn something new everyday around here.
Too bad it's not a Dyson Sphere, it might make the tin-foil hatters add another layer of tinfoil. Maybe I need to buy stock in a tinfoil company just in case.
One curious case of “what's that?” in astronomy is a puzzle: two gets astrophysicists on the way to an answer. An oddly-dimming star called EPIC 204278916 (EPIC in this article) might help boffins understand the “Dyson sphere” (no, it's not) Tabby's star. The group led by Simone Scaringi from the Max Planck Institute for …
It seems "Maybe an alien megastruture" is now in the list of politically correct unsayables (like, and I am totally making things up now, "Trump is not wrong", "Mabye blacks have police problems for a reason" or "Maybe Israel is kinda fascist") One immediately has to declare self-disgust at even have been forced to utter the words, state that anyone delecting in this kind of crimethink is a nutter and make references to tinfoil. And one may still get invited to a ritual disemboweling on CNN.
There's nothing politically incorrect about anything you listed except "Maybe Israel is kinda fascist". Everything else is simply incorrect. Politics don't enter into it.
As for the Israel thing, well, Israel is run by horrible people who do horrible things. But "fascism" isn't the correct term. They're their own thing. And yes, I don't understand why it's politically incorrect to say "well, shit, the way Israel's government responds to pretty much everything - both internally and externally - is awful, and a lot of their problems would solvable if they weren't arrogant, xenophobic, nationalistic, control freaks."
Somehow, saying the Israeli government is peopled by monsters is immediately a condemnation of all Israelis or even all Jews (Israeli or not). I don't get how that works, but apparently it's a thing.
The rest of your issues, however, are just wrong. Way before politics gets involved.
In terms of interplanetary observation a lot of cool things are happening. We are in a time when science and technology have allowed the construction of telescopes with previously unimaginable clarity and sensitivity. And given whats on the books things could get even more interesting.
I'm not saying it is a Dyson Sphere, it almost certainly is not, but I don't see why it only partially dimming prevents it from being one? Perhaps the civilisation only needs that much power? Maybe they're working on it but it's not finished? Maybe they ran our of economically viable material to make it with?
I don't get the enthusiasm. What's so exciting/unique/questionable/gripping/enigmatic about a very young star being partially eclipsed by a bunch of amorphous matter in an unpredictable pattern. S'bleedin' obvious that that's what some suns will look like in the early stages of planetary formation, shirley?