dr-becky 2 months ago
astrophysicist #Space and Time

Dr. Becky | Why Doesn’t Dark Matter Collapse Into Black Holes?

Why doesn’t dark matter collapse? Think about it, gravity pulls on it. There’s a huge amount of it; outweighing all the normal matter in the Universe.

So why doesn’t it form dark stars? Dark black holes? Or entire dark galaxies? Instead, it just sits there… in enormous, fuzzy clouds around galaxies. And that’s weird. Because normal matter doesn’t stay fuzzy, it collapses under its own gravity. It makes planets. It makes stars. It makes black holes.


And it was after my last video about whether the Milky Way’s centre could be a dark matter cloud instead of a supermassive black hole, many of you asked: "if the dark matter cloud has the same mass, why doesn’t it just collapse?"


So what is dark matter doing differently to normal matter...

Dr. Becky
astrophysicist