Scientists observed an unusual star explosion deep in space that was the 'most aspherical ever seen.” The explosion was a rare Fast Blue Optical Transient, a kind of explosion that astronomers have come to refer to as 'the cow.'
The observation was made after scientists accidentally – and luckily – saw a flash of polarized light in June 2018 that was captured by telescopes in Hawaii. A 2019 news release from, whose researcher Raffaella Margutti was part of the initially reported findings, says the explosion, dubbed AT2018cow, was a "spectacularly bright anomaly" 10 to 100 times brighter than supernovas. Scientists also observed that the explosion unleashed particles flying at 10% of the speed of light.
In Maund's study, researchers measured the polarization of that flash, which allowed them to identify the explosion's shape, and through that, they found that it was about the size of Earth's solar system in a galaxy about 180 million light-years away.
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