Astronomers using the giant Keck telescope in Hawaii have detected two superluminous supernovae – stellar explosions 10 to 100 times brighter than other supernova types. The two supernovae, dubbed SN2213 and SN1000+2016, were found at redshifts 2.05 and 3.90 breaking the previous ‘normal’ supernova redshift record of 2.36. “The light of these supernovae contains detailed information about the infancy of the Universe, at a time...
