Dark matter remains the focus of astronomers as they work to find out how its distributed in the Universe.
The fluctuations indicate that there’s a gravitational lensing effect from the smaller concentrations, in addition to that of the galaxy and its dark matter shell. In this case, there are spatial fluctuations in the density of dark matter down to a size of about 30,000 light-years. That’s way smaller than what the scientists term the “cosmological scale” for larger concentrations .
The Five-Hundred-meter Aperture Spherical Telescope was used to study Cloud-9 in an effort to constrain its dark matter component. From Wikimedia Commons, CC BY 3.0.
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