planisfério wikipedia - EAS
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Planisphere - Wikipedia
In astronomy, a planisphere is a star chart analog computing instrument in the form of two adjustable disks that rotate on a common pivot. It can be adjusted to display the visible stars for any time and date. It is an instrument to assist in learning how to recognize stars and constellations. The astrolabe,
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Xem thêmA planisphere consists of a circular star chartattached at its center to an opaque circular overlay that has a clear elliptical window or hole so that only a portion of the sky map will be visible in the window or hole area at any given
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Xem thêmThe word planisphere (Latin planisphaerium) was originally used in the second century by Claudius Ptolemy to describe the representation of a spherical Earth by a map drawn in the plane. This usage continued into the Renaissance: for example
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Xem thêmSince the planisphere shows the celestial sphere in a printed flat, there is always considerable distortion. Planispheres, like all charts, are made using
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Xem thêmThe upper disc contains a "horizon", that defines the visible part of the sky at any given moment, which is naturally half of the total starry sky. That horizon line is most of the time also distorted, for the same reason the constellations are distorted. The horizon line
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Xem thêm• Celestial globe - the representation of the starry sky on an apparent celestial sphere.
• List of astronomical instruments
• Armillary sphere- a framework of brass rings, which represent the...
Xem thêm• Bartsch, Jacob. Usus Astronomicus Planisphaerii Stellati, 1624. (Scans by Felice Stoppa.) The first cartographic use of the term planisphere.
• Planisphere – an interactive web application for large range of latitudes. It can also generate printable outputs for building the real tool....
Xem thêmAccurate planispheres represent the celestial coordinates: right ascension and declination. The changing positions of planets, asteroids or comets in terms of these coordinates can be looked up in annual astronomical guides, and these enable planisphere users
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planisfério - Wiktionary
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Planisfério celeste – Wikipédia, a enciclopédia livre
Um planisfério celeste consiste de uma carta celeste circular anexada em seu centro a uma cobertura circular e opaca que tem uma janela ou buraco elíptico de forma que apenas uma parte do mapa do céu vai ser visível na janela ou área do furo a qualquer momento. A carta celeste e a cobertura são montados de modo que eles são livres para girar sobre um ponto de articulação comum em seus centros. A carta celeste contém as estrelas mais brilhantes, constelações e (p…
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Planisfério : definição de Planisfério e sinónimos de ...
Cantino-planisfæren – Wikipedia
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