planisphere


Also found in: Dictionary, Wikipedia.

planisphere

(plan -ă-sfeer) A two-dimensional map projection centered on the northern or southern pole of the celestial sphere that shows the principal stars of the constellations, the Milky Way, etc., and is equipped with a movable overlay to indicate the stars visible at a particular time on any day of the year for a particular zone of terrestrial latitude.

Planisphere

 

the representation of a sphere on a plane in a normal (polar) stereographic projection. The planisphere was used until the 17th century to determine the times of the rising and setting of celestial bodies. It was usually a coordinate grid etched on a metal disk about whose center an alidade that facilitated calculations rotated. The planisphere fell into disuse with the introduction of special tables and nomographs.

planisphere

[′plan·ə‚sfir]
(mapping)
A representation, on a plane, of the celestial sphere, especially one on a polar projection, with means provided for making certain measurements such as altitude and azimuth.
Mentioned in ?
References in periodicals archive ?
Planisphere is a search engine that connects to a national database of employers and their retirement plans, and will be available to advisors who are registered to sell MassMutual retirement plans.
Lopo Homem's planisphere covers a wider area showing the coastal regions of North and South America in the West, and more of the Far East.
A planisphere works using stereographic projection.
Virilio calls the resulting upheavals the 'portable revolution,' which, along with revolutions in transportation and transmission technologies, will lead to what he calls an 'interactive planisphere.
1) Because Scorpio is much brighter than Orion; (2) Because the two constellations move to the same area at different times; (3) Because Scorpio moves faster than Orion; (4) Because Scorpio is closer to the earth" and "When we operate the planisphere (a device to show the locations of constellations), the position of Polaris changes from time to time (1) Yes; (2) No.
In an apartment of the great temple of Denderah, some fifty years ago, there was discovered upon the granite ceiling a sculptured and painted planisphere, abounding in centaurs, griffins, and dolphins, similar to the grotesque figures on the celestial globe of the moderns.
The cottages are on the edge of the Exmoor National Park, the first International Dark Sky Reserve in Europe, making it perfect for stargazing, and each comes equipped with its own planisphere and binoculars to help identify the constellations.
Each cottage equipped with its own planisphere and binoculars.
Ashbery, 83, celebrating the recent publication of his 28th book of poetry, Planisphere, has done more to "illuminate" our language than perhaps any other living poet of the last century.
was some random asteroid So I bought a Planisphere (such natty things), the better to pinpoint their location.
Left, 10-year-old Matthew Covell at the Centre for Life with a homemade planisphere
DARE words / terms Transposals acting pole optic angle aldermites (plural of misaltered (W2), misrelated (W2) aldermite) ambleshoot smoothable (W2) antigoslin insolating ants-mashers harassments apple shiner planisphere apron strap pro-Spartan (W2) aquadiente inadequate blow adders (plural of sword blade (W2) blow adder) blue martins (plural of bus terminal (OED), subterminal blue martin) bottle-arsed (from battledores bottle-arsed tupelo) cactus rose coruscates careless pin alpine cress castermine incremates (W2), metarsenic (W2), semitrance (a type of trance-like state (www.