Grim Reaper 6 Posted April 21, 2021 #1 Share Posted April 21, 2021 Scientists only know of one other ring like this and aren't sure how they form. The super rare ring of hydrogen gas was discovered around a galaxy about 260 million light-years from us. A Far-Off Galaxy Baffles Scientists With Its Starless Ring of Hydrogen (msn.com) 2 Link to comment Share on other sites More sharing options...
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