In 2003, lack of structure on the largest scales (above 60 degrees) in the cosmic microwave background as observed for one year by the WMAP spacecraft led to the suggestion, by Jean-Pierre Luminet of the Observatoire de Paris and colleagues, that the shape of the Universe is a Poincaré sphere.
Sphere | sphere | Poincaré sphere | Riemann sphere | Homology modeling | Bloch sphere | The Sphere (newspaper) | The Sphere | Star Ocean: Blue Sphere | Sphere packing | sphere packing | Sphere Origins' | McClintic Sphere | Inner sphere electron transfer | Hand with Reflecting Sphere | Greater East Asia Co-Prosperity Sphere | François Morellet, ''Sphere - Matter'' 1962, Skupturengarten Abteiberg Museum in Mönchengladbach | Ewald's sphere | Advanced Inertial Reference Sphere |