
An artist's illustration of a brilliant supernova, the explosive death of a star.
This supernova is one for the record books.
A mammoth star explosion known as SN2016aps, which occurred in a galaxy about 3.6 billion light-years from Earth, is the brightest supernova ever seen, a new study reports.
"We can measure supernovae using two scales: the total energy of the explosion, and the amount of that energy that is emitted as observable light, or radiation," study lead author Matt Nicholl, a lecturer in the School of Physics and Astronomy and the Institute of Gravitational Wave Astronomy at the University of Birmingham in England, said in a statement.
"In a typical supernova, the radiation is less than 1% of the total energy," Nicholl added. "But in SN2016aps, we found the radiation was five times the explosion energy of a normal-sized supernova. This is the most light we have ever seen emitted by a supernova."
SN2016aps is so odd and so extreme that Nicholl and his colleagues think it may be a "pulsational pair-instability" supernova, in which two big stars merge before the whole system goes boom. Such events are hypothesized, but astronomers have never confirmed their existence observationally.















Comment: Theories on the origins of Oumuamua abound: