The Joe Rogan Experience
#2217 - Brian Cox
Brian Cox
I mean, it's mainly theoretical, although we have now got photographs of them. So we have two photographs, which are radio telescope photographs. One of the one in the center of our galaxy, which is a little one. It's called Sagittarius A star. It's a little supermassive black hole. So it's about 6 million times the mass of the sun, which makes it a little supermassive.
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