A 'dead' galaxy full of dark matter is lurking close to home

At the edge of the Milky Way, there's a small galaxy called Triangulum II. It has just 1,000 stars, compared to the 100 billion estimated in our own galaxy, and its days of star formation are over, leaving it "dead." But Triangulum II may have a dark secret - one that makes it the most interesting ghost town in space.
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