Was the universe cold before the Big Bang?

Question

I think matter causes something to be hot or cold. That would mean before Big Bang there was no matter in the space so what would have been the temperature of space at that time. Even though there was ‘no matter’, for some reason, there were stars. Scientists don’t know if there’s just very little matter in the old universe, or none at all.

Answer 1

There is no universe before the Big Bang, it is the point at which space and time come into existence. There is no "where" that could have a temperature and no "when" you could call before matter. The question is meaningless.

Answer 2

All our notions of space and time , of what was there , what happened etc. come from exploration of the laws of physics, which are in the form they are in our universe i.e. the laws of physics are valid in the domain of our universe.

Questions regarding what happened before the big bang are questions outside the domain of our known laws of physics. It is equivalent to asking what the laws of physics are in another universe.

The best answer is . We do not know. Other universes do not follow our laws of physics and hence, we cannot say anything about them