KnowraSphereLinked fromLinked fromThe 40 pages that link to Sphere, each with the reason it gives.All 40Broader topic 10Related 10Narrower topic 12Compared with 8Gaussian curvatureBroader topic: Its two principal curvatures have the same sign, giving positive Gaussian curvature.Riemannian manifoldBroader topic: Its induced metric gives a standard example of constant positive curvature.ManifoldBroader topic: The sphere is a compact surface that cannot be covered by one coordinate chart.Surface areaBroader topic: Its surface area is four times the area of a great circle.Direct imagingBroader topic: Its observations have produced detailed images of exoplanets and circumstellar disks.Theorema EgregiumBroader topic: Its positive curvature cannot be removed by bending it into a flat plane without stretching.Surface of revolutionBroader topic: Rotating a semicircle around its diameter generates a sphere.Solid geometryBroader topic: The sphere is the basic example of a solid defined by a curved boundary.Carathéodory conjectureBroader topic: Every point on a sphere is umbilic, so it satisfies the claim non-isolatedly.Measurement geometry (colorimetry)Broader topic: The family that d/8 belongs to, contrasted with directional designs.