The shape of the universe? It's still contested, even in my time, but most physicists--myself included--believe it's spherical, with a radius of curvature equal to approximately one-hundred thirty billion light-years. It's so vast that, for all intents and purposes, it's treated as a nearly flat Lambda-CDM model with a slight positive curvature. Mathematically speaking, its ultimate shape matters less than its local shape.
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The shape of the universe? It's still contested, even in my time, but most physicists--myself included--believe it's spherical, with a radius of curvature equal to approximately one-hundred thirty billion light-years. It's so vast that, for all intents and purposes, it's treated as a nearly flat Lambda-CDM model with a slight positive curvature. Mathematically speaking, its ultimate shape matters less than its local shape.