File:Conditions During the Era of Reionization (Illustration) (2023-122).png

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More than 13 billion years ago, during the Era of Reionization, the universe was a very different place. The gas between galaxies was largely opaque to energetic light, making it difficult to observe young galaxies.

Summary

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Description
English: More than 13 billion years ago, during the Era of Reionization, the universe was a very different place. The gas between galaxies was largely opaque to energetic light, making it difficult to observe young galaxies. As stars and young galaxies continued to form and evolve, they began to change the gas around them. Over hundreds of millions of years, the gas converted from neutral, opaque gas to ionized, transparent gas.

What allowed the universe to become completely ionized, leading to the “clear” conditions we see in the present-day universe? Researchers using the James Webb Space Telescope found that galaxies are overwhelmingly responsible toward the end of this period. Read about their findings.

NASA, ESA, CSA, Joyce Kang (STScI)
Date 12 June 2023 (upload date)
Source Conditions During the Era of Reionization (Illustration)
Author Illustration
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Licensing

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Public domain This file is in the public domain because it was created by NASA, ESA and CSA. NASA Webb material is copyright-free and may be freely used as in the public domain without fee, on the condition that only NASA, STScI, and/or ESA/CSA is credited as the source of the material. This license does not apply if source material from other organizations is in use.
The material was created for NASA by Space Telescope Science Institute under Contract NAS5-03127. Copyright statement at webbtelescope.org. For material created by the European Space Agency on the esawebb.org site, use the {{ESA-Webb}} tag.

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