93% of the newfound galaxies that Webb spotted had never been seen before.
from galaxies and thus played a more important role in cosmic evolution than previously thought.
Now, a second team from the JADES program that has been studying galaxies that existed between 500 to 850 million years after the Big Bang, or between five to eight minutes of the two-hour movie describing the universe, thinks it has an answer to the long-standing question. "In this next scene of the universe, we are starting to actually see the impact of galaxy formation on the composition of the large scale universe," Ryan Endsley, a postdoctoral researcher at the University of Texas who led the second study, said at the news conference on Monday."Galaxies in the very early universe were just far more chaotic in general in how they formed stars.
Those emission lines are evidence that early galaxies were actively birthing stars, which then pumped"torrents of ultraviolet photons" into their respective galaxies. This way, the universe's early stars became the main drivers of cosmic reionization, Endsley said. "These extreme emission lines are actually relatively common in the very early universe," he said during his presentation."Almost every single galaxy that we are finding shows these unusually strong emission line signatures indicating intense recent star formation," he added in the statement."These early galaxies were very good at creating hot, massive stars."
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