What were the first stars?

The first stars created about 300 million years after the Big Bang, when the universe was still dark, from prehistoric gas clouds. The first stars were made of hydrogen and helium and no other elements - zero "metalicity". In astrophysics, metal is any element heavier than hydrogen or helium.

The first stars were considered huge, hundreds of solar materials, because the process of abdominal mass has just begun. The early universe was very homogeneous - there were only small deviations in the smooth distribution of matter. These deviations were slowly formed and condensed into local gas pockets. This process took a huge amount of time, because gravity is relatively weak when many things are not accumulated in one place. These later stars have a much higher metal content, which affects the EIR in an important way. Today, there could be no star much more massive than 150 suns. As a result of the presence of oxygen, nitrogen and carbon in the nucleus, the reactions of hydrogen fusion are catalyzed and the star would tear off before she had the chance to createto.

but not with the first stars. These things were massive. Scientists believe they may have captured a small view of the glow of these stars using Spitzer's cosmic telescope. Without heavy elements in their cores, these stars joined with a hydrogen using the P-P proton process, which lasts for a very long time. Yet, because of their extreme weight, these stars would have very dense and hot centers, which would speed up the reactions. The first stars have probably existed for more than a million years. Due to their extreme distance, we will probably not be able to observe them until the telescope technology improves significantly.