Post #652

🪐 In the Pinwheel Galaxy (Messier 101), astronomers have measured how its swirling arms rotate much faster than visible matter alone can explain. This strange speed points to dark matter—an invisible substance detected only by its extra gravity—outweighing normal stars and gas by up to six times, making Messier 101 a classic example of how much of the universe’s structure is hidden from our eyes. ✨ #darkmatter⚡#galaxies⚡#mysteries⚡#nasa⚡#galaxy⚡#stars⚡#astronomy⚡#universe⚡#cosmos⚡#space 👉subscribe Universe Mysteries 👉more Channels ​