The quiet, introverted monster of the galaxy will not spin

An animal is hidden in the middle of the galaxy, and it is barely moving.

This supermassive black hole, Sagittarius A * (SGRA *), is 15.1 million times larger than our Sun. It first revealed itself to scientists as a mysterious source Radio waves Back from the center of the galaxy in 1931; But it wasn’t until 2002 that researchers confirmed that radio waves were coming from something as big and compact as a black hole – a feat that got them to 2020. Nobel Prize in Physics. Oct. Just a few days before the team learned about their Nobel on On, another group learned something new about black holes: they rotate more slowly than a supermassive black hole, moving at speeds of less than 10% (probably much less). . Light.