HOW DO BLACK HOLES FORM??
Every one of us has this question??
Scientist think the smallest black holes formed when the universe began.
Stellar black holes are made when the centre of very big star falls in up on itself or collapses.
When this happen,it causes a supernova.
A supernova is an exploding star that blast,part of star in space.
Scientists think supermassive black holes were made at the same time as the glaxy they are in.
The study suggests that without a disc, the black hole would stop growing, meaning 50 billion suns would roughly be the upper limit. The only way it could get larger is if a star happened to fall straight in or another black hole merged with it.
"Bigger black hole masses are in principle possible -- for example, a hole near the maximum mass could merge with another black hole, and the result would be bigger still. But no light would be produced in this merger, and the bigger merged black hole could not have a disc of gas that would make light.
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