To nearly everybody’s surprise, as reported in January in the journal Nature, the bursts originated in a small “dwarf irregular” galaxy, one about a gigaparsec (just over 3 billion light years) away. This made the strength of the signal and its frequent repetitions even more astonishing. “If you’re detecting a bright flash from a gigaparsec, there’s an awful lot of energy associated with it,” Chatterjee said. “The more energy you associate with each event, the harder it gets to explain the repetition. Basically, what’s recharging the battery so quickly?”
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