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Hubble Finds Giant Halo Around Andromeda

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Researchers using NASA's Hubble Space Telescope have discovered a halo of gas enveloping the Andromeda galaxy like an immense atmosphere. The gargantuan halo stretches approximately a million light-years from Andromeda or roughly halfway to our own galaxy. Scientists estimate the giant halo contains about half the mass of the stars within Andromeda. More at NASA.gov.

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