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This manifold is often called the moduli space of vacua, or just the moduli space, for short. The term moduli is also used in string theory to refer to various continuous parameters that label possible string backgrounds : the expectation value of the dilaton field, the parameters (e.g. the radius and complex structure) which govern the shape ...
The moduli space is, therefore, the positive real numbers. Moduli spaces often carry natural geometric and topological structures as well. In the example of circles, for instance, the moduli space is not just an abstract set, but the absolute value of the difference of the radii defines a metric for determining when two circles are "close". The ...
Ian McDonald's novel Empress of the Sun features a parallel-universe version of our solar system where creatures evolved from dinosaurs have converted all the mass to an Alderson disk (with a bobbing sun). In Terry Pratchett's science fiction novel Strata the concept of an Alderson disk is brought up by the protagonist, Kin Arad, as an ...
[6] [73] Willy Ley's 1937 short story "At the Perihelion" involves a close approach to the Sun as part of an escape from Mars, [4] [5] [74] and Charles L. Harness's 1949 novel The Paradox Men (a.k.a. Flight into Yesterday) is a space opera that climaxes with a swordfight atop a space station on the surface of the Sun. [4] [5] [75] [76] In Ray ...
Moduli (physics), scalar fields for which the potential energy function has continuous families of global minima; The measurement of standard pitch in the teeth of a rotating gear; Bulk modulus, a measure of compression resistance; Elastic modulus, a measure of stiffness; Shear modulus, a measure of elastic stiffness
The moduli space of solutions to Hitchin's equations was constructed by Hitchin in the rank two case on a compact Riemann surface and was one of the first examples of a hyperkähler manifold constructed. The nonabelian Hodge correspondence shows it is isomorphic to the Higgs bundle moduli space, and to the moduli space of holomorphic connections.
The heliosphere is the magnetosphere, astrosphere, and outermost atmospheric layer of the Sun.It takes the shape of a vast, tailed bubble-like region of space.In plasma physics terms, it is the cavity formed by the Sun in the surrounding interstellar medium.
Solar physics is the branch of astrophysics that specializes in the study of the Sun.It intersects with many disciplines of pure physics and astrophysics.. Because the Sun is uniquely situated for close-range observing (other stars cannot be resolved with anything like the spatial or temporal resolution that the Sun can), there is a split between the related discipline of observational ...