# black hole physics

**URL:** <https://boards.straightdope.com/t/black-hole-physics/56275>\
**Category:** Factual Questions\
**Created:** [February 28, 2001, 9:44pm UTC](https://boards.straightdope.com/t/black-hole-physics/56275 "2001-02-28T21:44:42Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Enola\_Straight](https://avatars.discourse-cdn.com/v4/letter/e/dec6dc/32.png) [@Enola\_Straight](https://boards.straightdope.com/u/Enola_Straight)\
**Post date:** [February 28, 2001, 9:44pm UTC](https://boards.straightdope.com/t/black-hole-physics/56275/1 "2001-02-28T21:44:42Z")

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A black hole has gravity so strong, that not even light can escape it. It draws in all matter and energy within reach.  
If gravity propagates at the speed of light, how does the hole radiate gravity when it can’t radiate light?  
enolancooper

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**Author:** ![erislover](https://avatars.discourse-cdn.com/v4/letter/e/71e660/32.png) [@erislover](https://boards.straightdope.com/u/erislover)\
**Post date:** [February 28, 2001, 10:15pm UTC](https://boards.straightdope.com/t/black-hole-physics/56275/2 "2001-02-28T22:15:13Z")

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Gravity, as understood by the theory that predicts black holes, isn’t really a force but a distortion of space.