Celestial pole - Wikipedia
网页The north and south celestial poles are the two points in the sky where Earth's axis of rotation, indefinitely extended, intersects the celestial sphere. The north and south celestial poles appear permanently directly overhead to observers at Earth's North Pole and South Pole, respectively.
Celestial pole | astronomy | Britannica
网页definition. In astronomical map: The celestial sphere. …about a northern or southern celestial pole, the projection into space of Earth’s own poles. Equidistant from the two poles is the celestial equator; this great circle is the projection into space of Earth’s Equator. Read More.
What is the North Star and How Do You Find It? - NASA Science
网页2021年7月28日 · Polaris is located quite close to the point in the sky where the north rotational axis points – a spot called the north celestial pole. As our planet rotates through the night, the stars around the pole appear to rotate around the sky. Over the hours, these stars each sweep out a circle around the celestial pole.
天极（天文学）_百度百科
网页天极（celestial pole），是指地球的自转轴（地轴）向天球延伸后，在无穷远处与天球交会的两个假想点。. 夜空中的星星，看起来是从头顶上由东向西移动，使人产生天球也在从东向西自转的感觉，这是由于人观测星空时是以地球为参考系的缘故；由于地球不是 ...
Polestar | Night Sky, Celestial Navigation & Celestial Pole
网页Polestar, the brightest star that appears nearest to either celestial pole at any particular time. Owing to the precession of the equinoxes, the position of each pole describes a small circle in the sky over a period of 25,772 years. Each of a succession of stars has thus passed near enough to the.
2.1 The Sky Above - Astronomy 2e - OpenStax
网页The celestial poles, being 90° from the celestial equator, must then be at the north and south points on your horizon. As the sky turns, all stars rise and set; they move straight up from the east side of the horizon and set straight down on the west side.
Celestial Sphere - University of Illinois Urbana-Champaign
网页The extension of the Earth's rotation axis to the sky defines the North and South Celestial Poles (the NCP and SCP), while the extension of the Earth's equatorial plane defines the celestial equator. The NCP is in the constellation Ursa Minor (the Smaller Bear) close to the direction of the star Polaris , otherwise called the North Star .
Celestial poles - Vocab, Definition, and Must Know Facts - Fiveable
网页Celestial poles are the two imaginary points in the sky where Earth's axis of rotation, indefinitely extended, intersects the celestial sphere. The North Celestial Pole is near Polaris, while the South Celestial Pole does not have a bright star marking its position.
Celestial Pole -- from Eric Weisstein's World of Astronomy
网页The celestial poles are the projections of the Earth's north and south poles into the celestial sphere. Because of precession of the equinoxes, these poles wander along a circle with a period of about 26,000 years. Though Polaris is currently the closest bright star to the north celestial pole (a.k.a. the North Star), Vega will be the closest ...
APOD: 2021 January 1 - Galaxies and the South Celestial Pole
网页In this starry panorama streching about 60 degrees across deep southern skies the South Celestial Pole is somewhere near the middle though, flanked by bright galaxies and southern celestial gems. Across the top of the frame are the stars and nebulae along the plane of our own Milky Way Galaxy.
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