Marcus Chown – A Crack In Everything: How Black Holes Came in from the Cold and Took Cosmic Centre Stage

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Black holes aren’t black! If there is one thing everybody knows about black holes it is that they are so dense that even light can’t escape. And yet, as Marcus Chown explains, black holes are some of the most prodigiously luminous objects in space. So they’re not holes. And they’re not black. But they are among the most fascinating and counter-intuitive objects in the universe. Not to mention that they are, in Marcus’s phrase, “the stuff of physicists’ nightmares.” Why? Because the maths tells us that any star a little bigger than the sun will eventually collapse into a singularity – a point of infinite density and infinite temperature. … Continue reading →