|By International Centre for Radio Astronomy Research
It released five times more energy than the previous record holder.
Professor Melanie Johnston-Hollitt, from the Curtin University node of the International Centre for Radio Astronomy Research, said the event was extraordinarily energetic.
"We've seen outbursts in the centres of galaxies before but this one is really, really massive," she said.
"And we don't know why it's so big.
"But it happened very slowly—like an explosion in slow motion that took place over hundreds of millions of years."
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