<ul><li>A rare flat explosion, known as a Fast Blue Optical Transient (FBOT), has been discovered by scientists over 180 million light-years away.</li><li>FBOTs are an extremely rare class of explosion, and this latest discovery is only the fifth one ever recorded.</li><li>The disc-like explosion has baffled scientists who are still trying to understand how bright FBOT explosions occur.</li><li>This discovery was made by chance, and scientists used the Liverpool Telescope and polaroid glasses to measure the polarisation of the collected data and map the edges of the blast.</li></ul>

Astronomers discover flattest explosion in space

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