Could LIGO have detected dark matter? Maybe dark matter is actually billions and billions and billions of black holes.
Does the shape of the dark matter distribution in the Milky Way’s satellite galaxies depend on the direction from which they are observed?
Do wobbling galaxies at the center of galaxy clusters indicate interactions between dark matter particles?
Observations of stars today can reveal billions of years of history.
Star-forming galaxies have been eliminated as the top suspects for the origin of the IceCube neutrinos, leaving behind a dwindling list of unexpected possibilities.