Heating of particles when entering- Indeed, light cannot escape from within a black hole, but the matter falling into the black hole can get really hot before it falls in. This heating is due to the fact that matter accelerates near black holes. As a result, matter emits lots of light and other radiation as it falls into a black hole.
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Have some words u don't understand? click on- definitions
Howdid they know about the black hole? Beam from black hole
The causes of a black hole
History of black hole discovery
How is black hole formed?
Black Hole is an infinitely small point?
One that failed to become Black hole, becomes white dwraf or neutron star
observations
