Search results
Results from the WOW.Com Content Network
Celestial cartography, [1] uranography, [2] [3] astrography or star cartography [citation needed] is the aspect of astronomy and branch of cartography concerned with mapping stars, galaxies, and other astronomical objects on the celestial sphere. Measuring the position and light of charted objects requires a variety of instruments and techniques.
A celestial map by the Dutch cartographer Frederik de Wit, 1670. A star chart is a celestial map of the night sky with astronomical objects laid out on a grid system. They are used to identify and locate constellations, stars, nebulae, galaxies, and planets. [1] They have been used for human navigation since time immemorial. [2]
Visualization of a celestial sphere. In astronomy and navigation, the celestial sphere is an abstract sphere that has an arbitrarily large radius and is concentric to Earth.All objects in the sky can be conceived as being projected upon the inner surface of the celestial sphere, which may be centered on Earth or the observer.
Coordinate systems in astronomy can specify an object's relative position in three-dimensional space or plot merely by its direction on a celestial sphere, if the object's distance is unknown or trivial. Spherical coordinates, projected on the celestial sphere, are analogous to the geographic coordinate system used on the surface of Earth.
Dutch celestial cartography in the Age of Discovery (10 P) S. Star atlases (2 C, 8 P) Star maps (4 P) Pages in category "Celestial cartography"
Finally, the Ptolemaic armillary sphere on top of the time of day display, in assembly and movement, is a miniature version of the Globe. It has the Earth fixed at the centre with the celestial sphere surrounding it and revolving daily around it. The inside of the sphere has a solar figure moving around the ecliptic annually. [4]
Star atlases, mapping stars, galaxies, and other astronomical objects on the celestial sphere. Subcategories This category has the following 2 subcategories, out of 2 total.
It may be implemented in spherical or rectangular coordinates, both defined by an origin at the centre of Earth, a fundamental plane consisting of the projection of Earth's equator onto the celestial sphere (forming the celestial equator), a primary direction towards the March equinox, and a right-handed convention. [1] [2]