The discovery of a supernova explosion via rare "cosmic magnifying glasses" most likely refers to gravitational lensing. Gravitational lensing is a prediction of Albert Einstein's general theory of relativity that occurs when the gravitational field of a massive object, such as a galaxy or galaxy cluster, bends and distorts light from a distant background object, such as a supernova. An international team of scientists recently discovered an extremely rare gravitationally lensed supernova known as 'SN Zwicky.' The supernova, which was located more than 4 billion light years away, was magnified nearly 25 times by a foreground galaxy acting as a