lens space
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Lens space — A lens space is an example of a topological space, considered in mathematics. The term often refers to a specific class of 3 manifolds, but in general can be defined for higher dimensions.In the 3 manifold case, a picturesque description of a… … Wikipedia
Space probe — Pioneer H hangs in a museum A space probe is a scientific space exploration mission in which a spacecraft leaves Earth and explores space. It may approach the Moon, enter interplanetary, flyby or orbit other bodies, or approach interstellar space … Wikipedia
Lens speed — refers to the maximum aperture diameter, or minimum f number, of a photographic lens. A lens with a larger maximum aperture (that is, a smaller minimum f number) is a fast lens because it delivers more light intensity (illuminance) to the focal… … Wikipedia
space perception — Introduction process through which humans and other organisms become aware of the relative positions of their own bodies and objects around them. Space perception provides cues, such as depth and distance, that are important for movement… … Universalium
Lens hood — In photography, a lens hood or lens shade is a device used on the end of a lens to block the sun or other light source in order to prevent glare and lens flare.The geometry of the lens hood can vary from a plain conical section (much like a lamp… … Wikipedia
Space Shuttle — STS redirects here. For other uses, see STS (disambiguation). This article is about the NASA Space Transportation System vehicle. For the associated NASA STS program, see Space Shuttle program. For other shuttles and aerospace vehicles, see… … Wikipedia
Space elevator — A space elevator for Earth would consist of a cable anchored to the Earth s equator, reaching into space. By attaching a counterweight at the end (or by further extending the cable upward for the same purpose), the center of mass is kept well… … Wikipedia
space — Any demarcated portion of the body, either an area of the surface, a segment of the tissues, or a cavity. SEE ALSO: area, region, zone. SYN: spatium [TA]. [L. spatium, room, s.] alveolar dead s … Medical dictionary
Seifert fiber space — A Seifert fiber space is a 3 manifold together with a nice decomposition as a disjoint union of circles. In other words it is a S^1 bundle (circle bundle) over a 2 dimensional orbifold. Most small 3 manifolds are Seifert fiber spaces, and they… … Wikipedia
Real projective space — In mathematics, real projective space, or RP n is the projective space of lines in R n +1. It is a compact, smooth manifold of dimension n , and a special case of a Grassmannian.ConstructionAs with all projective spaces, RP n is formed by taking… … Wikipedia
Stunted projective space — In mathematics, a stunted projective space is a construction on a projective space of importance in homotopy theory. Part of a conventional projective space is collapsed down to a point.More concretely, in a real projective space, complex… … Wikipedia
