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ohwilleke
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This bbc report http://news.bbc.co.uk/1/hi/wales/south_east/4288633.stm states that scientists believe that they have found a galactric scale mass of hydrogen gas without any apparent stars.
If explained by dark matter, it would need thousands of times the visible hydrogen mass to hold together. The article notes that previous proposed "starless galaxies" have turned out not to be starless.
If explained by dark matter, it would need thousands of times the visible hydrogen mass to hold together. The article notes that previous proposed "starless galaxies" have turned out not to be starless.