The Ultimate Black Hole

There’s a really nice article up on black holes — eloquent, artistic, and accurate. The punchline? Black holes may have an upper limit, where if they get too big (a few billion times the mass of the sun — the Milky Way black hole is only a few million times the mass of the sun) all the gas whirling around just outside the event horizon will be so energetic that the radiation will push away any additional mass.

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