Apr 22, 2023 06:08 PM
https://bigthink.com/starts-with-a-bang/...-big-bang/
KEY POINTS: When JWST first opened its eyes and peered into the deep Universe, what it found was quite surprising: lots of young, massive, evolved-looking galaxies. According to our standard model of cosmology — with dark matter, dark energy, normal matter and radiation — these types of galaxies would require substantial amounts of time to form, grow, and evolve. With all of these galaxies found between 300-400 million years after the Big Bang, is modern cosmology (and, by association, the Big Bang) in trouble? Results are mixed.
[...] it’s possible that either the preliminary data is unreliable or that our assumptions for how the early stages of cosmic structure formation proceed are flawed. While there are some early observations that could wind up pointing to a tension between what JWST is seeing and what our current understanding of the laws and composition of the Universe are, any such assertions that “the Big Bang/ΛCDM/standard cosmology is in trouble” are definitely premature at this point. Without better data — i.e., a deep, large-area, robustly calibrated, spectroscopic survey — we don’t even know if these galaxies truly possess anomalous properties. An in-progress JWST survey, COSMOS-Web, should settle the issue... (MORE - missing details)
KEY POINTS: When JWST first opened its eyes and peered into the deep Universe, what it found was quite surprising: lots of young, massive, evolved-looking galaxies. According to our standard model of cosmology — with dark matter, dark energy, normal matter and radiation — these types of galaxies would require substantial amounts of time to form, grow, and evolve. With all of these galaxies found between 300-400 million years after the Big Bang, is modern cosmology (and, by association, the Big Bang) in trouble? Results are mixed.
[...] it’s possible that either the preliminary data is unreliable or that our assumptions for how the early stages of cosmic structure formation proceed are flawed. While there are some early observations that could wind up pointing to a tension between what JWST is seeing and what our current understanding of the laws and composition of the Universe are, any such assertions that “the Big Bang/ΛCDM/standard cosmology is in trouble” are definitely premature at this point. Without better data — i.e., a deep, large-area, robustly calibrated, spectroscopic survey — we don’t even know if these galaxies truly possess anomalous properties. An in-progress JWST survey, COSMOS-Web, should settle the issue... (MORE - missing details)