According to the European space Agency, the first stars in the Universe originated much before the microwave background.
This became known thanks to the analysis, which was conducted by satellite Planсk. The study showed that the first stars were required to reionizatsii atoms.
At the time when they were single sources, the cosmos was about 700 million years. Because now in our view of the Universe includes a huge number of galaxies and stars, it’s hard to imagine the existence of space 13.8 billion years ago.
Scientists believe that at this point, the universe was hot and dense, there was a lot of neytrina particles, electrons, photons and protons. Because the universe was like a dense fog. It gradually expanded and became transparent after 38000 years.
Since then, the photons traveled freely in all directions. It took another few hundred billion years in order for the atoms came together to form a star.
