Mystery spiral galaxy arms explained?

Using a quartet of space observatories, University of Maryland astronomers may have cracked a 45-year mystery surrounding two ghostly spiral arms in the galaxy M106.

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<p><a href="http://www.physorg.com/news95422094.html">Mystery spiral galaxy arms explained?</a></p> <p>Using a quartet of space observatories, University of Maryland astronomers may have cracked a 45-year mystery surrounding two ghostly spiral arms in the galaxy M106.</p>