According to foreign media, New Atlas, a new study shows that many small satellite systems operating around the Milky Way are actually some of the first galaxies to emerge after the Big Bang. The birth of these vague, early galaxies represents an important step in the evolution of the universe, eventually creating huge, breathtaking galaxies that astronomers now perceive.
In a joint study conducted by Durham University and the Harvard-Smithsonian Center for Astrophysics, scientists discovered two different groups of satellite systems. These galaxies follow the route around the Melkweg. The first group consists of extremely dark galaxies, while the second group is brighter. Compared with spiral galaxies (such as the Milky Way), the individual galaxies that make up these two groups are very small. The team discovered that the collected data this time fit well with the theoretical model formed by the galaxies that they developed earlier. Scientists can use their models to derive the timing of satellite systems.
When the universe was only 380,000 years old, the first atom began to form. These are hydrogen atoms. Hydrogen is the simplest element of the known element and is still the most common element in the universe today. In the first atom, a hundred million years after what the astronomers the & # 39; era of the universe & # 39; called, cooled hydrogen slowly and settled in a huge halo of dark matter. Once collected in the halo, the huge hydrogen cloud gradually becomes unstable and collapses to form the first star.
Lively new stars destroy a large amount of ultraviolet radiation that interacts with surrounding matter, ionizing hydrogen clouds that do not yet flow together and get rid of their electrons. While the ionized hydrogen atoms cool back to the point where they can precipitate to a larger halo of dark matter. More stars and galaxies appeared in the Milky Way in about a billion years.
This new study shows that the first darker galaxies of the Milky Way are one of the oldest galaxies in the universe. Carlos Frenk, director of the Institute of Computational Cosmology at Durham University, said: "In our universe, the first galaxy formed in the galaxy's own backyard is equivalent to finding the remains of the first people living on earth." This is very exciting.
The results of this research support the "Λ-cold model of dark matter" of the evolution of the universe, which uses dark matter as a driving force to help the universe transform from a simple hydrogen atom to a rich and varied environment observed today by astronomers. The document that introduced the study was published in the Journal of Astrophysics.
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