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{{Short description|Real line of position in celestial navigation}} ...in]] [[Thomas Hubbard Sumner]] in 1837, published in 1843 and is the basis of an important method in [[celestial navigation]]. ...

{{Short description|Type of conformal map projection}} ...projection SW.JPG|250px|thumb|Stereographic projection of the world north of 30°S. 15° graticule.]] ...

...ea_projection_SW.jpg|400px|thumb|Lambert cylindrical equal-area projection of the world; standard parallel at 0°]] ...0°, normal) cylindrical equal-area projection with [[Tissot's indicatrix]] of deformation]] ...

...ined using a [[sextant]]) the information needed for establishing a [[line of position]], generally by [[intercept method]]. ...titude, and sometimes also the [[azimuth]], of a celestial body for a line of position; or the data obtained by such observation.<ref>''[[The American Pr ...

{{short description|Distance measured along the surface of the Earth}} ...or '''geodetic distance''' is the [[distance]] measured along the surface of the [[Earth]], or the shortest arch length. ...

{{Short description|Set of instructions used to construct horizontal sundials}} ...al|horizontal sundial]] is a geometric [[Graphical projection|projection]] of an [[equatorial sundial]] onto a horizontal plane. ...

...projection. 15° graticule, 11°E central meridian. Imagery is a derivative of NASA’s Blue Marble summer month composite with oceans lightened to enhance ...300px|The Strebe 1995 projection with Tissot's indicatrices of distortion. Circles spaced at 30° intervals.]] ...

[[File:Ellis_wormhole_catenoid.pdf|thumb|right|384px|Equatorial cross section of the Ellis wormhole, a catenoid <math>\mathcal C</math>]] ...time the curvature of space has nothing to do with gravity (the 'curvature of time’, one could say). ...

{{Short description|Method of representing objects in 3D computer graphics}} ...present an object, with the goal of using the points to create one or more of the three permanent representations. ...

...]'s surface. As [[Earth's orbit|Earth orbits]] the [[Sun]] over the course of a [[year]], the Sun appears to move with respect to the [[fixed stars]] on ...ross the sky in a [[Sun path]] that depends on the observer's geographic [[latitude]]. The time when the Sun [[culmination|transits]] the observer's [[meridian ...

...otherwise [[WP:NOTABLE|notable]]. Because there is no limit to the number of possible map projections,<ref name="SnyderFlattening"> | title=Flattening the Earth: Two Thousand Years of Map Projections ...

...The solution of a triangulation network on an ellipsoid is therefore a set of exercises in spheroidal trigonometry {{harv|Euler|1755}}. .... However, {{harvtxt|Newton|1687}} showed that the effect of the rotation of the Earth results in its resembling a slightly oblate ellipsoid: in this ca ...

{{Short description|Family of geometric shapes}} ...h the squareness parameter <math>\epsilon_1</math>. It is a generalization of an ellipsoid, which is a special case when <math>\epsilon_1=\epsilon_2=1</m ...

...hm of the cross ratio formed by these two points and the two intersections of their line with the absolute]] ...c geometry]], [[elliptic geometry]], and [[Euclidean geometry]]. The field of [[non-Euclidean geometry]] rests largely on the footing provided by Cayley– ...

| caption = WISE image of Luhman 16. In the {{abbr|GMOS|Gemini Multi-Object Spectrograph}} image in t |appmag_1_passband=i <small>([[Deep Near Infrared Survey of the Southern Sky|DENIS]] filter system)</small> ...

{{About|the content of the Mercator 1569 World map|details of the projection|Mercator projection|biographical details|Gerardus Mercator}} ...Mercator was 62, by the engraver [[Frans Hogenberg]] who contributed many of the topographical images in Civitates Orbis Terrarum. See the [[:de:Frans H ...

...]A '''marine food web''' is a [[food web]] of [[marine life]]. At the base of the ocean food web are single-celled algae and other plant-like organisms k ...c interactions can also provide a lot of information about the functioning of marine ecosystems. ...