Astronomers discover a strange universal rule behind black hole eruptions
Predicting a cosmic tantrum years in advance sounds like the kind of thing astronomy would never offer, but that's the promise here. If the same rule governs jet launching from a black hole the size of a city and one weighing billions of suns, then the messy process of a star getting shredded becomes a bit more clockwork.
I find the scale invariance beautiful, the way astrophysicists keep finding that physics doesn't care how big your object is. But the details matter. Universal rules in astronomy have a habit of holding until they don't, so I'd want to know how many events the study covered and whether the rule held across extremes, like a fast-spinning versus a slow-spinning black hole.
Still, if it holds, the payoff is concrete. We might get warning before the night sky lights up, and that feels like a small superpower.