Celestial sphere - Wikipedia, the free encyclopedia
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In astronomy and navigation, the celestial sphere is an imaginary sphere of arbitrarily large radius, concentric with the Earth and rotating upon the same axis. All objects in the sky can be thought...
en.wikipedia.org/wiki/Celestial_sphere
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Celestial spheres - Wikipedia, the free encyclopedia
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The celestial spheres , or celestial orbs, were the fundamental celestial entities of the cosmological celestial mechanics first invented by Eudoxus,<sup class="noprint Template-Fact" title="This cl...
en.wikipedia.org/wiki/Celestial_spheres
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the Celestial Sphere ... The Celestial Sphere was (and remains) an useful way in which to represent the Universe and, in fact, it is still the way astronomers choose to model the observable sky. ... How is the Celestial Sphere model able to provide such an accurate representation of the Universe (and sky)?
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zebu.uoregon.edu/~imamura/121/sep29/motions.html
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Lets picture the Earth at the center of a huge sphere called the celestial sphere. Lets project some of Earth's key geographic features outward into space to provide the celestial sphere with some features as well to establish directions and our bearings.
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inkido.indiana.edu/a100/celestialsphere.html
inkido.indiana.edu/a100/celestialsphere.html
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The stars remain fixed on the celestial sphere with respect to themselves. The earth's pole describes a circular wobble of 23.5 degree amplitude centered on a point in the constellation of Draco every 26,000 years (often called "precession of the equinoxes").
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astro.wsu.edu/worthey/astro/html/lec-celestial-sph.html
astro.wsu.edu/worthey/astro/html/lec-celestial-sph.html
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Mathematical Techniques: The Celestial Sphere ... The diagram below represents the celestial sphere. At the centre of the sphere is the Earth, and hence the observer's vantage point. The surface of the sphere acts as the reference against which all celestial bodies observed from the centre are located.
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www.hps.cam.ac.uk/starry/armillmaths.html
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The celestial sphere is an imaginary sphere of gigantic radius with the earth located at its center. The poles of the celestial sphere are aligned with the poles of the Earth. The celestial equator lies along the celestial sphere in the same plane that includes the Earth's equator.
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astrosun2.astro.cornell.edu/academics/courses/astro201/...
astrosun2.astro.cornell.edu/academics/courses/astro201/cel_sphere.htm
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About the Office of Naval Research - Office of Naval Research ... ... Technology Strategic Plan describes ONR's investments in 13 technology focus areas that will ... ... Science & Technology Organization...
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www.onr.navy.mil/focus/spacesciences/observingsky/spher...
www.onr.navy.mil/focus/spacesciences/observingsky/sphere1.htm
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