Stellar stream found in Hubble image of dwarf galaxy may offer new dark matter constraints
While commuting, former astronomer David Hendel spotted a faint stellar stream in a Hubble image of the ultra-diffuse galaxy UGC 9050-Dw1, identifying it as the first such stream found outside the Milky Way. The stream, torn from a globular cluster by the galaxy's gravity, could provide new insights into dark matter's nature. Hendel described the moment as an exciting discovery.
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First extragalactic stellar stream used to map dark matter distribution · Space exploration
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Original headline: “Chance gaze at old Hubble Telescope image leads to discovery that could reveal dark matter's secrets.” Browse more stories.