Astronomers Find Third Galaxy Losing Its Dark Matter, Confirming Strong Cosmic Collision Theory

Image of the NGC 1052-DF2 Ultra Diffuse Galaxy that started the chain of discoveries of galaxies lacking dark matter. Credit - NASA, ESA, and P. van Dokkum (Yale)

Astronomers have long argued that dark matter is the invisible scaffolding that holds galaxies together. Without its immense gravitational pull, the galaxies’ rotating necks would force them to fly sideways. But now, scientists have found a series of galaxies that do not seem to have their dark matter completely. The latest in this string, known … Read more