EHT CollaborationImaging showing how M87* evolves over time.Making a black hole is easy. Just squeeze a bunch of stuff into a small enough volume. It doesn’t even matter what you use. You can collapse stars, planets, old car tires, Labubus, or missing left socks. The resulting black hole will only depend on the mass, rotation, and electric charge of the original material. At least that’s what we think. The idea that black holes only have three physical characteristics is called the no-hai...
