The 69 dwarf galaxies were spotted during a three-year sky scan known as the Cosmic Assembly Deep Extragalactic Legacy Survey, or CANDELS. Their average mass is only about 1 percent the mass of our own Milky Way galaxy, but they're churning out stars at such a furious pace that the stars are on track to double in just 10 million years. It would take the Milky Way 10 billion years to achieve a similar doubling.
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