File:Dark Matter is a No Show in Ghostly Galaxy (gemini1801a).tiff

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Left: The ultra-diffuse galaxy is rich in globular clusters, which hold the key to understanding this mysterious object’s origin and mass.

Summary[edit]

Description
English: Left: The ultra-diffuse galaxy is rich in globular clusters, which hold the key to understanding this mysterious object’s origin and mass. Right: A closer look at one of the globular clusters within the galaxy, which are all much brighter than typical, the brightest emitting almost as much light as the brightest within the Milky Way. The spectrum, obtained by Keck Observatory shows the absorption lines used to determine the velocity of this object. Ten clusters were observed, providing the information needed to determine the mass of the galaxy, revealing its lack of dark matter.
Date 28 March 2018 (upload date)
Source Dark Matter is a No Show in Ghostly Galaxy
Author Gemini Observatory/NSF/AURA/Keck/Jen Miller/Joy Pollard
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