Yes! Couldn't remember what the heck it was called, was trying to search online to find what it was haha, then was like wait its probably already commented somewhere here. I also don't fully grasp the idea, which definitely adds to the scariness haha. Not something I worry about, but definitely one of those things that makes you shiver a bit when reading about it.

As for actual objects we know about, I'd say pulsars as they're just giant death rays lol.