Looking Back in Time, Is That Right?

We use ae property of light, which is that it has a finite speed. So for the first stars, all we do are tune into light that has been travelling to us for 30 million and then we see the universe as it was then. And how many of these stars were there? A fascinating question that i can't give you in answer to. It really shows how little we know about about this time. There are so many theoretical models covering all sorts of things like loads and loads and loads of first population three stars, and they didn't last very long. Or lots of galaxies, or lots of black holes. And sot there really are a zoo, a zoo of different