Pieter van Dokkum, Roberto Abraham, Gemini Observatory/AURA.
Gemini Images Galaxy That Is 99.99 Percent Dark Matter
The dark galaxy Dragonfly 44. The image on the left is a wide view of the galaxy taken with the Gemini North telescope using the Gemini Multi-Object Spectrograph (GMOS) as part of a Fast Turnaround program. The close-up on the right is from the same very deep image, revealing the large, elongated galaxy, and halo of spherical clusters of stars around the galaxy’s core, similar to the halo that surrounds our Milky Way Galaxy. Dragonfly 44 is very faint for its mass, and consists almost entirely of Dark Matter.
