- The Milky Way weighs in at about 1.5 trillion solar masses, according to the latest measurements by Hubble and Gaia. Only a tiny percentage of this is attributed to the 200 billion stars and supermassive black hole at the center. Most of the rest of the mass is locked up in dark matter. https://www.nasa.gov/feature/goddard/2019/what-does-the-milky-way-weigh-hubble-and-gaia-investigate 501 comments space
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