A recently spotted bright light in the sky is improving astronomers’ understanding of stellar death.
The night sky is filled with blips and flashes, a constantly changing sea of lights. Some of these changes are from Earth-bound happenings such as aircraft flying overhead, but some are from distant sources in space. Astronomers hunt for these fleeting phenomena, known as astronomical transients, by observing the sky regularly and looking for differences that appear.
Astronomers Yuhan Yao and Shri Kulkarni, both at the California Institute of Technology, along with Anna Ho of the University of California, Berkeley, and Daniel Perley of Liverpool John Moores University in England, first spotted this explosion in June 2020 in visible-light images from the Zwicky Transient Facility , an automated telescope at California’s Palomar Observatory.
Astronomers are still puzzling out what makes these supernovae special. The current theory is that cows have a very active “central engine”—something left behind by the star’s core, such as a black hole devouring matter or a neutron star rapidly spinning, that provides energy to the supernova. They also have less material shrouding this central region than most exploding stars, providing a view of their interesting center.
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