Residue of the death of a super-giant star hundreds of times bigger than our Sun has been detected by an international team of astronomers.
The collapsing star blasted out a flash of gamma rays and X-rays, which produced afterglows that can be observed at optical and radio energies today.
Most gamma ray bursts last less than one minute but one high-energy emission, studied by the Australian and French research team, lasted seven hours.
That star is now a black hole.
Such explosions are very rare and require special conditions.
Read more at The University of Western Australia