Space
Mystery cosmic objects light up in X-ray then go dim in an hour
Digging through old observations of galaxies, astronomers have discovered X-ray flares from objects they can’t yet identify
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Digging through old observations of galaxies, astronomers have discovered X-ray flares from objects they can’t yet identify
The detector's latest discovery means we are now firmly in a new era of astronomy – it matches up convincingly with what we already know about black holes