A project enabling volunteers to help professional astronomers find supernovae has achieved success within a week of launching.
The explosion in question is a Type Ia supernova that went off in a galaxy 970 million light-years away.
The explosion predated the emergence of complex life on Earth, but the light has only reached us now, in time to be picked up by the SkyMapper 1.3-meter (4.3 feet) telescope.
The comparison, along with many others, was placed on the citizen science portal Zooniverse, where three amateurs marked it as a likely supernova.
SkyMapper followed up and confirmed that not only is the light a supernova, but it is just the sort they were looking for, all with the speed needed to properly track the star's decline.
Unlike those who discover comets, supernova discoverers do not get their names immortalized, with the object in question dubbed SN2017dxh, but the finders will have their names submitted to the International Astronomical Union.