Black Holes

Q: What is the theoretical boundary surrounding a black hole beyond which the escape velocity exceeds the speed of light?

Answer this question in the quiz to reveal the explanation.

Q: What is the name of the supermassive black hole harboring roughly 4 million solar masses located at the center of the Milky Way?

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Q: Which international radio observatory array captured the first direct silhouette image of a black hole in the galaxy M87 in 2019?

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Q: What theoretical thermal radiation predicted by Stephen Hawking in 1974 is thought to cause black holes to slowly evaporate over eons?

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Q: What is the informal astrophysical term for the extreme vertical stretching and horizontal compression an object experiences when falling into extreme tidal gravity?

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Q: In 2015, which laser interferometer observatory made the first direct detection of gravitational waves caused by colliding stellar-mass black holes?

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Q: What mathematical radius (Rs = 2GM/c^2) determines the physical size of the event horizon for a non-rotating spherically symmetric black hole?

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Q: What is the name of the rotating region outside the event horizon of a Kerr black hole where spacetime is dragged along with its rotation?

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Q: What famous physics theorem asserts that an isolated stationary black hole can be completely described by only three numbers: mass, electric charge, and angular momentum?

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Q: What is the glowing disk of superheated plasma and gas orbiting a black hole before plunging past the event horizon called?

Answer this question in the quiz to reveal the explanation.

Question 1

What is the theoretical boundary surrounding a black hole beyond which the escape velocity exceeds the speed of light?

Question 2

What is the name of the supermassive black hole harboring roughly 4 million solar masses located at the center of the Milky Way?

Question 3

Which international radio observatory array captured the first direct silhouette image of a black hole in the galaxy M87 in 2019?

Question 4

What theoretical thermal radiation predicted by Stephen Hawking in 1974 is thought to cause black holes to slowly evaporate over eons?

Question 5

What is the informal astrophysical term for the extreme vertical stretching and horizontal compression an object experiences when falling into extreme tidal gravity?

Question 6

In 2015, which laser interferometer observatory made the first direct detection of gravitational waves caused by colliding stellar-mass black holes?

Question 7

What mathematical radius (Rs = 2GM/c^2) determines the physical size of the event horizon for a non-rotating spherically symmetric black hole?

Question 8

What is the name of the rotating region outside the event horizon of a Kerr black hole where spacetime is dragged along with its rotation?

Question 9

What famous physics theorem asserts that an isolated stationary black hole can be completely described by only three numbers: mass, electric charge, and angular momentum?

Question 10

What is the glowing disk of superheated plasma and gas orbiting a black hole before plunging past the event horizon called?

What is the theoretical boundary surrounding a black hole beyond which the escape velocity exceeds the speed of light?

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