Distant Galaxies ‘Lift the Veil’ on the End of the Cosmic Dark Ages

Milestones in the history of the Universe (not to scale). The intergalactic gas was in a neutral state from about 300,000 years after the Big Bang until light from the first generation of stars and galaxies began to ionize it. The gas was completely ionized after 1 billion years. The LAGER study takes a close look at the state of the Universe at 800 million years (yellow box) to investigate when and how this transformation occurred.

Credit:

NAOJ

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Id:noao1703b
Type:Artwork
Release date:July 11, 2017
Related releases:noao1703
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