Astronomers now think that there is a black hole with more than 4 million times the mass of our Sun at the center of our Galaxy? Roughly how large would the event horizon of such a supermassive black hole be?

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Quizplus · Accepted Answer

The event horizon of a black hole, which is essentially the "point of no return" where the gravitational pull becomes so strong that not even light can escape, is directly related to its mass. For a black hole with more than 4 million times the mass of our Sun, like the one at the center of our Galaxy (Sagittarius A*), the event horizon would be about 17 times the size of the Sun. This size is calculated based on the Schwarzschild radius formula, which is used to determine the radius of the event horizon of a non-rotating black hole.

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