Newly found galaxy is 99.99% dark matter
AUG 26, 2016
DOI: 10.1063/PT.5.0210063
Washington Post : Dark matter accounts for much of the mass in the universe, but it is not evenly distributed. About 83% of the Milky Way’s mass is due to dark matter; the percentage is considerably higher for some dwarf galaxies. Now Pieter van Dokkum of Yale University and his colleagues have found a galaxy, called Dragonfly 44, that has roughly the same mass as the Milky Way yet has only 1% as many stars. The researchers estimate that 99.99% of the galaxy’s mass is from dark matter. Because Dragonfly 44 is about average when it comes to galactic size, scientists suspect that similarly dark matter–dominated galaxies are relatively common.
© 2016 American Institute of Physics
