Massive primordial galaxies found in ‘halo’ of dark matter

The Aurora Australis, or Southern Lights Observations of two galaxies made with the National Science Foundation-funded Atacama Large Millimeter/submillimeter Array (ALMA) radio telescope suggest that large galaxies formed faster than scientists had previously thought.
The two galaxies, first discovered by the South Pole Telescope at NSF's Amundsen-Scott South Pole Station in Antarctica, were massive and star-filled at a time when the cosmos was less than a billion years old.
The observation came as a surprise, ... More at https://www.nsf.gov/news/news_summ.jsp?cntn_id=243892&WT.mc_id=USNSF_51&WT.mc_ev=click
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