百年宇宙假设或将被推翻

EVIDENCE is emerging that the universe is far lumpier than we had thought – a finding that could solve some of today’s most puzzling cosmological mysteries. We thought the universe was roughly the same wherever you looked When modelling the universe, cosmologists can’t describe every single galaxy, so they make simplifications. Typically, they assume that the universe on the largest scales is homogeneous and isotropic, meaning it is roughly the same wherever you look. This view is known as the FLRW model, named after Alexander Friedmann, Georges Lemaître, Howard Robertson and Arthur Geoffrey Walker, who developed it in the 1920s. But evidence is emerging that the underlying assumptions are wrong, outlined in three papers. …