The scientific community supports the theory of grey holes or black holes?

What is a “grey hole”? Do you mean this: https://en.m.wikipedia.org/wiki/Q_star

if so, they are purely hypothetical. There is no evidence they exist. 

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

 

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.