Tag Archive: companion galaxy

Sep 29 2011

A galaxy made of dark matter?


Is this blob of hydrogen actually spinning, thus betraying all the dark matter in the vicinity, distending nearby NGC 4254? Scientists say maybe. Skeptics of the dark-matter interpretation argue that VIRGOHI21 is simply a tidal tail of the nearby galaxy NGC 4254. The observations, made with the Westerbork Synthesis Radio Telescope in the Netherlands, show …

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