Wednesday , April 14 2021

Billions of dwarf galaxies can be captured from the first photos of the “space network”

According to astronomy and astrophysics, one small area of ​​the sky was observed for 140 hours using a very large telescope (VLT) and its MUSE (multi-unit spectroscopy) instrument. By 1.3 billion, the most observable thread in the universe had already been created. year. Approximate – about 800 million. Years later. This is a particularly important time for the fast-growing universe of galaxies.

The space observed in this aspirational study is already well known. It is part of Hubble’s deepest field. The area has been observed by the Hubble Space Telescope since 2003. The beginning of the end of 2004. The telescope image is constantly being improved and is the deepest to date Took a photo of the universe. New observations will enable it to expand further.

Previous astronomers estimate that there are about 10,000 galaxies in the sky. This number is expected to grow. At the deepest field sites studied by the team, that number is about 40 percent. high. Not only that. There may be many more galaxies invisible to us.

The researchers used simulation to understand what these gas-based cosmic network threads illuminate. The gases in these interstellar connections are widely dispersed, which means that if we see them, they are illuminated by something. The simulation helped to answer the group’s questions. There are many galaxies in the universe, and researchers believe that billions of these threads are illuminated by dwarf galaxies.

“We think that our visible light comes mostly from young galaxies. Less than a billion years after the Big Bang, such small galaxies marked the end of a cosmic dark age in which the universe was illuminated and heated by first-generation stars. In a study at the Leiden Observatory.

This finding will surely start a big debate. According to the most popular hypothesis, gaseous fibers glow due to a cosmic ultraviolet background created by young stars in galaxies. Against this background the air heats up and begins to glow. But before we know the secrets of the space network, it needs many more observations.

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