Where Are All the Baryons?
The matter we can see and touch is made of baryons, which we know makes up about 5% of the Universe. But there’s problem: some of that 5% is missing!
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astronomy solar system planet formation gravitational waves radio astronomy black holes stellar evolution star formation protoplanetary disks binary stars theory AGN dark matter supernovae planetary science observations stars Kepler galaxy evolution AAS spectroscopy astronomical methods astrophysics habitability simulations exoplanets cosmology transits galaxies accretion