van Dokkum discovers dark galaxies in Coma Cluster with Dragonfly telescope
“Pieter van Dokkum… and colleagues took a unique look at Coma through the Dragonfly Telephoto Array.. .The Dragonfly is designed to find faint, fuzzy blobs, but what its images revealed surprised the team.”
“On Coma’s outskirts lurk 47 galaxies similar in size to the Milky Way — but with 1,000 times fewer stars. To survive in crowded Coma, these dark galaxies must contain 98% dark matter to hold themselves together, much higher than the fraction in the universe at large (73%).”
Excerpt from Sky and Telescope article; link to full article below.