Hubble and Gaia accurately weigh the Milky Way

Hubble and Gaia accurately weigh the Milky Way
In a striking example of multi-mission astronomy, measurements from the NASA/ESA Hubble Space Telescope and the ESA Gaia mission have been combined to improve the estimate of the mass of our home galaxy the Milky Way: 1.5 trillion solar masses.
phys.org
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