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Hubble finds quasar 600tn times brighter than the sun

A quasar with the brightness of about 600 trillion suns - the brightest ever seen in the early universe - has been discovered by the Hubble Telescope.
Astronomers used data from the Nasa/European Space Agency's telescope to find the ancient quasar - the extremely bright nucleus of an active galaxy created by energy released by gas falling towards the supermassive black hole at its centre.
They believe the quasar can provide an insight into galaxies' birth, when the universe was about a billion years old.
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