A Brief History of Black Holes

Correction to what I say at 2:46 mins: The Schwarzschild radius of the Sun is a few miles (not a few thousand miles). What's in the illustration is correct. Sorry about that.

Correction to what I say at 4:47: It should have been "They had turned from mathematically wrong to mathematically corrrect but non-physical"

Black holes rose to the attention of physicists early in the 20th century when Karl Schwarzschild found that they are one of the possible solutions of the equations of Einstein's theory of general relativity. However, at first they were believed to be mathematical curiosities without physical relevance. In this video I explain how and why the situation changed.

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