Astronomers have located the universe's missing hydrogen gas in vast ionized halos enveloping galaxies, addressing a significant cosmological mystery.
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#Astrophysics
#Cosmology
#DarkMatter
phys.org/news/2025-04...
Preprint here
arxiv.org/abs/2407.07152
Astronomers tallying up all the normal matter—stars, galaxies and gas—in the universe today have come up embarrassingly short of the total matter produced in the Big Bang 13.6 billion years ago. In fa...
