NASA / ESA’s James Webb Space Telescope observes GOODS-South, an area of the sky previously studied by the Hubble Space Telescope, that contains over 45,000 galaxies. It was captured for the JWST Advanced Deep Extragalactic Survey (JADES) program and the team discovered hundreds of galaxies that existed when the universe was less than 600 million years old.
Webb’s NIRSpec (Near-Infrared Spectrograph) instrument was used to search for signatures of star formation. JADES also identified galaxies that existed during the Epoch of Reionization, or when the universe underwent a transformation from opaque to transparent. What they found was that many of these galaxies show strong emission line signatures due to the creation of multitudes of hot, massive stars.
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Previously, the earliest galaxies we could see just looked like little smudges. And yet those smudges represent millions or even billions of stars at the beginning of the universe. Now, we can see that some of them are actually extended objects with visible structure. We can see groupings of stars being born only a few hundred million years after the beginning of time. We’re finding star formation in the early universe is much more complicated than we thought,” said Marcia Rieke, Co-Lead of the JADES program from theUniversity of Arizona in Tucson.
