With the help of machine-learning techniques, a team of astronomers has discovered a dozen quasars that have been warped by a naturally occurring cosmic ‘lens’ and split into four similar images. Quasars are extremely luminous cores of distant galaxies that are powered by supermassive black holes. https://www.sciencedaily.com/releases/2021/04/210408152327.htm
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Discovery of rare ‘quadruply imaged quasars’ can help solve cosmological puzzles
