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New Galactic Distance Measurements Increase Milky Way's Mass and Rotation Speed

Artist's conception of the Milky Way.

Locations of star-forming regions (dots) superposed on an artist's conception of the Milky Way. The locations have been measured by "triangulation" using the NRAO/NSF Very Long Baseline Array of radio telescopes.

Credit: Mark Reid, Harvard-Smithsonian Center for Astrophysics; Robert Hurt (NASA/IPAC)

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