Question

what is a black hole???


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Answer 1

Answer:

• A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.

Answer 2

Answer:

Black holes

• Black holes pack an immense amount of mass into a surprisingly small space.
• The black hole at the center of M87, 55 million light-years away, has swallowed the mass of 6.5 billion suns.
• Yet its event horizon is only 40 billion kilometers across—about four times the diameter of Neptune’s orbit.
• No existing telescope has the resolution to see such a distant, tiny object.