The discovery of a hydrogen ring said to be nearly four times the size of the Milky Way has proved to be groundbreaking but puzzling for astronomers who have only seen such a phenomenon in one other instance.

A team led by Omkar Bait, a doctoral student at the National Centre for Radio Astrophysics (NCRA) working under the supervision of Yogesh Wadadekar in Pune, India, recently detected a massive neutral hydrogen ring in a galaxy dubbed AGC 203001 and located some 260 million light-years from Earth.



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