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Showing posts from September, 2023

Stars from the dawn of the universe have been found in the heart of our own Galaxy

  ncient stars born during the Cosmic Dawn were identified in the center of the Milky Way. As part of the survey to discover some of the oldest known stars in the universe, scientists have conducted a comprehensive search for these ancient stars, but difficult, and found that the measure they rotate around the galactic center is relatively quiet, despite. Chaos surrounded them. Their findings, led by astronomer Anke Arentsen from the University of Cambridge in the UK, were presented at the UK’s annual National Astronomy Conference. We can tell that the age of the star is based on how much metal is in it. When the first stars in the universe were formed, they must have made themselves out of the elemental materials available at the time – mainly hydrogen and helium. But the nuclear furnace burning in their cores began fusing hydrogen atoms together. Go for the heavier stuff, from helium to iron. Then, when they explode in complex supernovae, they carry these heavier elements through...

The Webb Space Telescope illuminates the first lines of the Cosmic Web

Fibers of 10 galaxies seen only 830 million years after the birth of the universe Woven throughout our universe is a web-like galactic structure called the cosmic web. Galaxies are strung together by threads in this vast web, which also has huge gaps. Now, astronomers using the Webb have discovered the early structure of this structure, a narrow filament of 10 galaxies that existed only 830 million years after the Big Bang. 3 million[{” attribute=””>light-year-long structure is anchored by a luminous quasar – a galaxy with an active, supermassive  black hole  at its core. The team believes this early thread of the cosmic web will eventually evolve into a massive cluster of galaxies. The same study also probes the properties of eight quasars in the young universe. Scientists determined that the galaxies’ central black holes, which existed less than a billion years after the big bang, range in mass from 600 million to 2 billion times that of our Sun. They are still working t...