Third time’s the charm for a row of faint galaxies without dark matter

– Jim Shelton
A Yale-led team of astronomers found a third galaxy devoid of dark matter — located alongside the other two in a formation that has never been seen before. Michael Keim, a PhD student in astronomy, is first author of the new study published in The Astrophysical Journal.
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The inset image shows Hubble Space Telescope imaging of DF9, the third “galaxy without dark matter” along a trail of galaxies (Keim et al. 2026). The background shows the full trail of galaxies, including the first two galaxies without dark matter, DF2 and DF4. (DECaLS)