and points to the existence of completely dark halos as a challenge to early universe cosmology Tags: dark matter

Dark Galaxy. The illustration was prepared using DALEE and is not a scientific image.

Galaxies without stars? Researchers home in on the universe's darkest halos

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Astrophysicists have long suspected that small, non-star-forming dark matter halos may exist, but no one knew the exact mass limit at which the transition occurs.