Popular Science

The Milky Way’s Massive Stars The red spots in this illustration show young, massive stellar objects are distributed in four major arms in the Milky Way. The black bulls-eye shows Earth’s location. (Credit: Robert Hurt of the Spitzer Science Center)

Study: Our Galaxy Has Four Arms

The new evidence contradicts earlier findings that there were only two spiral arms in the Milky Way.

CBS Tampa–12/24/2013

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