Question: when did the first stars form and how?

Ee Lyn Lim answered on 20 Jun 2013:

I don’t think scientists really know the answer to this question yet! We have theories – kind of like saying ‘it MIGHT have happened this way’. One of those theories goes like this: about 14 billion years ago there was a ‘Big Bang’, which was the universe expanding from a hot, dense state and releasing lots and lots of energy. Afterwards, when the universe started to cool, all this energy began to form simple particles, like protons and neutrons. These particles came together to form atoms, like hydrogen and helium. When great big clouds of these atoms began to stick together, they began to have gravity, and pull inwards to form a dense ball of gas separate from the rest of the stuff. These balls became denser and denser, and hotter and hotter on the inside, until they started giving off light – and there you go! A star 🙂

I don’t know very much about astronomy, but this video can tell you a lot more about stars! http://www.phdcomics.com/tv/#020