elliptical surface

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• Surface brightness fluctuation — (SBF) is a secondary distance indicator used to estimate distances to galaxies. The technique uses the fact that galaxies are made up of a finite number of stars. The number of stars in any small patch of the galaxy will vary from point to point …   Wikipedia

• elliptical projection — noun : a map of the earth s surface upon the interior of an ellipse …   Useful english dictionary

• Dwarf elliptical galaxy — Dwarf elliptical galaxies, or dEs, are elliptical galaxies that are much smaller than others. They are classified as dE, and are quite common in galaxy groups and clusters, and are usually companions to other galaxies. Contents 1 Examples 2… …   Wikipedia

• Fundamental plane (elliptical galaxies) — The fundamental plane for elliptical galaxies relates the effective radius, average surface brightness and central velocity dispersion.MotivationMany characteristics of a galaxy are correlated. For example, as one would expect, a galaxy with a… …   Wikipedia

• Ruled surface — A hyperboloid of one sheet is a doubly ruled surface: it can be generated by either of two families of straight lines. In geometry, a surface S is ruled if through every point of S there is a straight line that lies on S. The most familiar… …   Wikipedia

• Yield surface — A yield surface is a five dimensional surface in the six dimensional space of stresses. The state of stress of inside the yield surface is elastic. When the stress state lies on the surface the material is said to have reached its yield point and …   Wikipedia

• Ocean surface wave — Ocean surface waves are surface waves that occur on the free surface of the ocean. They usually result from wind, and are also referred to as wind waves. Some waves can travel thousands of miles before reaching land. They range in size from small …   Wikipedia

• Highly Elliptical Orbit — (HEO) is an elliptic orbit characterized by a relatively low altitude perigee and an extremely high altitude apogee. These extremely elongated orbits can have the advantage of long dwell times at a point in the sky during the approach to and… …   Wikipedia

• Saddle surface — A saddle surface is a smooth surface containing one or more saddle points. The term derives of the peculiar shape of historical horse saddles, which curve both up and down.Classical examples of two dimensional saddle surfaces in the Euclidean… …   Wikipedia

• Cervix — Schematic frontal view of female anatomy …   Wikipedia

• Ellipse — Elliptical redirects here. For the exercise machine, see Elliptical trainer. This article is about the geometric figure. For other uses, see Ellipse (disambiguation). Not to be confused with ellipsis. An ellipse obtained as the intersection of a… …   Wikipedia