Black Holes

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. The boundary of no escape is called the event horizon. Although it has a great effect on the fate and circumstances of an object crossing it, it has no locally detectable features according to general relativity. In many ways, a black hole acts like an ideal black body, as it reflects no light. Moreover, quantum field theory in curved spacetime predicts that event horizons emit Hawking radiation, with the same spectrum as a black body of a temperature inversely proportional to its mass. This temperature is of the order of billionths of a kelvin for stellar black holes, making it essentially impossible to observe directly.

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Do black holes explode?

Do black holes explode?

Do black holes explode?

Are black holes wormholes?

Are black holes wormholes?

Theoretical physicists argue that black holes admit vortex structures

New study says two black holes could collide within the next 3 years

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Colliding black holes could clock universe's expansion rate | Space

Colliding black holes could clock universe's expansion rate

Ready for its close-up: New technology sharpens images of black holes

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