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In this episode, remember that ultra diffuse galaxy I told you about in SFNs 226 and 232? You know, the one with NO dark matter? Well turns out there is dark matter there after all.
This was always a controversial finding, back in SFN 226 I reported that the group who found Dragonfly 44, an ultra diffuse galaxy with very little dark matter in it, had also taken a closer look at another galaxy, NGC1052-DF2 and wrote a paper, in Nature of all places, announcing that according to their observations, this galaxy rotated just like a galaxy would if it had no dark matter at all in it.
Read more at ScienceAlert.com:
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