Hubble and Gaia –“Measures Milky Way’s Vast Envelope of Dark Matter”

    “Because of their great distances, globular star clusters are some of the best tracers astronomers have to measure the mass of the vast envelope of dark matter surrounding our galaxy far beyond the spiral disk of stars,” said Tony Sohn of STScI, who led the Hubble measurements of our galaxy’s mass, using NASA’s … Continue reading Hubble and Gaia –“Measures Milky Way’s Vast Envelope of Dark Matter”