NGC 1275, often referred to as Perseus A, is the brightest member of the Perseus galaxy cluster. It lies roughly 225 million light-years away and has a diameter of slightly more than 100,000 ...
An immense black hole 250 million light years away is blowing the lowest B flat ever heard 1. It sits at the hub of a giant galaxy called NGC 1275, in the Perseus cluster of galaxies. The ...
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