Green Pea Galaxies Could Explain Post-Big Bang Universe

Space





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This is a Hubble Space Telescope image of the compact green pea galaxy J0925. Ivana Orlitová/Astronomical Institute/Czech Academy of Sciences (Prague)

Astronomers have long been questioning how galaxies could have ionized all the gas present in the universe after the Big Bang, leading to the universe we see today, and struggled to match the strength of the emission from galaxies with how quickly reionization happened. But a citizen science discovery has led them to work out the possible culprit for cosmic reionization.