The detection of a highly compact galaxy that formed relatively soon after the Big Bang and displayed an impressive rate of star formation is the latest example of how the James Webb Space Telescope is reshaping our understanding of the early universe.
"Our current understanding of galaxy formation in the early universe doesn't predict that we would see this many galaxies at such early times in the universe's life, so this is really exciting," said Hayley Williams, a University of Minnesota doctoral student in astrophysics and lead author of the study published this week in the journal"As we observe more and more of these distant galaxies, we'll be able to put together a more complete picture of how the first...
"JWST's reach into the first billion years of the universe has been amazing, and has given astronomers a lot to consider and try to understand about when and how many galaxies formed," University of Minnesota astronomy professor and study co-author Patrick Kelly said. The researchers examined this galaxy's chemical composition, finding, for example, an oxygen abundance much lower than typically found in present-day galaxies - and for good reason. Oxygen and other elements heavier than hydrogen and helium are forged in the thermonuclear furnaces at the interior of stars and then blown into space when stars explode at the end of their life cycles.
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