The Weirdness of Dark-Matter Free Galaxies

  Welcome to our very strange Universe. And, yes, that is a galaxy. The discovery of yet another dark-matter free, ultra-diffuse galaxy, raises a number of unanswered questions for astronomers: how are they formed? What do they tell us about standard cosmological models? How common are they, and what other unique properties do they have? … Continue reading The Weirdness of Dark-Matter Free Galaxies