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Posted
2 minutes ago, Siyatanush said:

The idea of grey holes was first postulated by Stephen Hawking. He said that black holes can not exist, instead grey holes exist. 

 

Can you provide a reference, because I have never heard of "grey holes" before.

But it still sounds like a pretty speculative idea.

There is a lot of evidence for black holes, such as the one at the centre of our galaxy.

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