SUNSET: 
Ghost-like Galaxy Defies Dark Matter Model
Astronomers have discovered a large but very dim ghost-like galaxy. Its existence challenges our notions of dark matter.
How Galaxies Lose Their Dark Matter
A careful study of cosmological simulations shows that dark matter–less galaxies aren't impossible — just really rare.
New Distances Support Idea of Dark Matter-less Galaxies
New distances to two dwarf galaxies with unusually spread-out stars support the idea that these galaxies have little to no dark matter.
Why Are Two Ghost Galaxies Missing Dark Matter?
Ultra-diffuse galaxies are usually dark matter-rich. But astronomers have discovered two of these galaxies that lack dark matter altogether.
Globular Clusters Shine in a Galaxy Lacking Dark Matter
You may have seen recent news about NGC 1052–DF2, a galaxy that was discovered to have little or no dark matter. Now, a new study explores what NGC 1052–DF2 does have: an enigmatic population of unusually large and luminous globular clusters.
A Galaxy Without (Much) Dark Matter
Astronomers have found a peculiar object: a fluffy galaxy that has little to no dark matter.
Globular Clusters for Faint Galaxies
The origin of ultra-diffuse galaxies (UDGs) has posed a long-standing mystery for astronomers. New observations of several of these faint giants with the Hubble Space Telescope are now lending support to one theory.
Dark Galaxies Suffuse the Coma Cluster
Following on a surprising find reported last year, astronomers have now discovered almost 1,000 dark matter-rich galaxies in the Coma Cluster.
Dark Galaxies Discovered in Coma Cluster
A bizarre set of galaxies in the Coma Cluster have lost most of their stars (or star-making material), making them especially rich in dark matter.
