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Topic: Celestial pole

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	Age of the Goddess
		The pole of the ecliptic is not the same as the North Celestial Pole, which lies at North 90 degrees.
		The pole of the ecliptic is the center point of the ecliptic as projected onto the celestial dome.
		The vernal equinox marks a point on the ecliptic considered to be an indicator of a zodiacal age, while the North Celestial Pole points to the a star in the northern sky considered to be an indicator of the polar age.
	aquarian-age.net /goddess.html (3559 words)

	Celestial pole - Wikipedia, the free encyclopedia
		The two celestial poles are the imaginary points where the Earth's spin axis intersects the imaginary rotating sphere of "gigantic radius", called the celestial sphere.
		The celestial poles are also the poles of the celestial equatorial coordinate system, meaning they have declinations of +90 degrees and -90 degrees (for the north and south celestial poles, respectively).
		The north celestial pole currently has nearly the same coordinates as the bright star Polaris (which is Latin for "Pole Star").
	en.wikipedia.org /wiki/Celestial_pole (538 words)

	Introduction to Spherical Astronomy: p. 17
		At the north pole (latitude=+90°), the north celestial pole (NCP) is at zenith and the celestial equator lies on the horizon.
		At the equator (latitude=0°), the north celestial pole (NCP) is on the northern horizon and the south celestial pole (SCP) is on the southern horizon.
		At the south pole (latitude=-90°), the south celestial pole (SCP) is at zenith and the celestial equator lies on the horizon.
	www.physics.csbsju.edu /astro/CS/CS.16.html (908 words)

	North Pole - Wikipedia, the free encyclopedia
		The Geomagnetic North Pole is the pole of the Earth's geomagnetic field's dipole moment (somewhat confusingly, it is technically the south pole of the dipole).
		The Geomagnetic North Pole is the pole of the Earth's geomagnetic field closest to true north.
		Astronomers define the north "geographic" pole of a planet or other object in the solar system by the planetary pole that is in the same ecliptic hemisphere as the Earth's north pole.
	en.wikipedia.org /wiki/North_Pole (3024 words)

	Celestial Navigation (Site not responding. Last check: 2007-10-26)
		Celestial Equator: The plane passing through the celestial sphere that is parallel to Earth's equater is the Celestial Equator (K is on the celestial equator in Figure 1).
		Celestial axis and poles: The axis through the center of the celestial sphere perpendicular to the celestial equator is the celestial axis.
		The declination of the celestial body (the body is denoted by star on Figure 4) is the arc of the body's meridian from the celestial equator to the place of the body on the sphere.
	www.math.ubc.ca /~cass/courses/m308-02b/projects/jackson/Page1.html (795 words)

	Celestial Sphere (Site not responding. Last check: 2007-10-26)
		The poles of the celestial sphere are aligned with the poles of the Earth.
		Analogous to the latitude on Earth, the Declination of an object on the celestial sphere is measured northward or southward from the plane containing the equator.
		The declination of the equator is 0 degrees, the North Celestial Pole, +90 degrees, the South Celestial Pole, -90 degrees.
	astrosun.tn.cornell.edu /academics/courses/astro201/cel_sphere.htm (416 words)

	Astronomy 202 (Site not responding. Last check: 2007-10-26)
		The celestial equator is the great circle on the celestial sphere that lies midway between the celestial poles.
		The north and south celestial poles are the intersection of the celestial sphere with the extension of the Earth’s axis of rotation.
		The ecliptic is the intersection of the plane of the Earth’s orbit and the celestial equator.
	astroweb.astr.cwru.edu /jeffk/ast201/solutions2.html (814 words)

	Poleshifts (1)
		The north and south celestial poles are the projection onto the celestial sphere of the earth's north and south geographic poles, and the celestial equator is the projection of the earth's equator.
		The north and south celestial poles are 23.4° from the north and south ecliptic poles respectively.
		The vernal equinoctial point is the point on the celestial equator which the sun crosses at the vernal equinox, and the corresponding point on the earth's equator is defined as the beginning of the sign Aries -- whatever the constellation in which this occurs.
	ourworld.compuserve.com /homepages/dp5/pole1.htm (4014 words)

	Astronomy Without a Telescope
		The Earth's axis of rotation intersects the celestial sphere at the celestial poles.
		The number of degrees the celestial pole is above the horizon is equal to the latitude of the observer.
		Celestial objects on the celestial equator are up 12 hours and those south of the celestial equator are above the horizon for less than 12 hours because you see less than half of their total 24-hour path around you.
	www.astronomynotes.com /nakedeye/s4.htm (1466 words)

	Celestial Sphere
		The latitude of the north pole is 90°, that of the equator 0°.
		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.
		At the north pole, the Sun is circumpolar from the time of Vernal Equinox passage to the time of Autumnal Equinox passage; it does not rise between the Autumnal and Vernal Equinox passages (vice versa in the southern hemisphere).
	www.astro.uiuc.edu /~kaler/celsph.html#zodiac (1937 words)

	Solutions to Study Problem Set 2 and 3 (Site not responding. Last check: 2007-10-26)
		The celestial poles and the celestial equator then cannot be defined either, since they are the projections of their counterparts on Earth.
		The Celestial Sphere is an imaginary construct used to represent the appearance of the sky.
		The Ecliptic is the apparent path of the Sun with respect to the stars on the Celestial Sphere over the course of one year, and it is the projection of the the Earth's orbit plane onto the celestial sphere.
	www.astro.indiana.edu /~classweb/a100s0503/Problem/soln2.html (2407 words)

	vik dhillon: phy105 - the celestial sphere - introduction
		The celestial sphere is an imaginary sphere of infinite radius centred on the Earth, on which all celestial bodies are assumed to be projected.
		At the north pole, the celestial equator lies on the horizon.
		As the observer moves further south in latitude, the north celestial pole moves further away from the zenith until it lies at the horizon when the observer is at the Earth's equator.
	www.shef.ac.uk /physics/people/vdhillon/teaching/phy105/phy105_celsphere_intro.html (1352 words)

	eSky: Northern Celestial Pole
		This is very useful for navigation in the northern hemisphere, since the altitude of the Northern Celestial Pole is always equal to the observer's own latitude: by measuring the Pole's angle to the horizon, it's possible to exactly calculate your own distance from the Earth's equator.
		The Northern Celestial Pole is an extension of the Earth's geographic North Pole into the sky.
		Because the Celestial Poles coincide with the Earth's geographic poles, this line also represents the Earth's north-south axis with respect to the Galaxy as a whole.
	www.glyphweb.com /esky/concepts/northerncelestialpole.html (586 words)

	The Official Graham Hancock Website: Forum
		And even though the idea that the north celestial pole is a fixed point holds true for a short a very period of time, the statement becomes invalid over long periods of time because of precession.
		The fact is that the north celestial pole drifts away from the fixed field of stars at the rate of about 20" arcseconds a year due to the perpetual wobble-like cycle of our planet.
		The pole of the ecliptic is located in the heart of the constellation of Draco, approximately between the stars Zeta Draco and Al Tais.
	www.grahamhancock.com /forum/BauvalR2-p2.htm (690 words)

	Meade Instruments Corporation - Meade LX200 Instruction Manuals
		The Poles of the celestial coordinate system are defined as those 2 points where the Earth's rotational axis, if extended to infinity, North and South, intersect the celestial sphere.
		Thus, the North Celestial Pole is that point in the sky where an extension of the Earth's axis through the North Pole intersects the celestial sphere.
		With all celestial objects therefore capable of being specified in position by their celestial coordinates of Right Ascension and Declination, the task of finding objects (in particular, faint objects) in the telescope is vastly simplified.
	www.meade.com /manuals/lx200/apxb.html (1794 words)

	celestial pole. The Columbia Encyclopedia, Sixth Edition. 2001-05 (Site not responding. Last check: 2007-10-26)
		The celestial pole is important as a reference point in the equatorial coordinate system; the celestial meridian passes through it, as do the hour circles of the stars.
		Although there is no bright star near the south celestial pole, the Southern Cross (see Crux) points directly to it.
		The altitude of the celestial pole in an observer’s hemisphere is equal to the observer’s latitude on the earth.
	www.bartleby.com /65/ce/celest-po.html (149 words)

	Celestial Sphere
		The celestial sphere has a north and south celestial pole as well as a celestial equator which are projected reference points to the same positions on the Earth surface.
		Declination is the equivalent of latitude measured in degrees from the celestial equator (0 to 90).
		It is measured north and south of the celestial equator and ranges from 0° at the celestial equator to 90° at the celestial poles, being taken to be positive when north of the celestial equator and negative when south.
	zebu.uoregon.edu /~js/ast122/lectures/lec02.html (2041 words)

	Astronomy - Celestial navigation - Nalini Chandra and John Percy
		Halfway between the celestial poles is the celestial equator, a projection of Earth's equator onto the sky.
		The stars on the celestial equator rise due east and set due west.
		For latitudes between the North Pole and the equator, the North Celestial Pole is tilted away from your zenith, the point directly above you.
	www.astronomy.com /asy/default.aspx?c=a&id=2287 (568 words)

	Peter Alway Astronotes 1 (Site not responding. Last check: 2007-10-26)
		(In the norther hemisphere, the altitude of the north celestial pole is equal to the observer's lattitude.
		The south celestial pole is at -90 degrees declination.
		the celestial equator, of course is at 0 degrees declination.
	members.aol.com /satrnpres1/astronomy/unit1c.html (2711 words)

	Navigator Light Software
		The declination is measured in the plane North-South, from the Celestial Equator.
		The celestial sphere poles, being in the axis of rotation, remain fixed in the sky.
		Because both Earth and Celestial equators are in the same plane, the latitude of the GP is equal to the declination of the star.
	www.tecepe.com.br /nav/inav_c11.htm (1545 words)

	The celestial poles (Site not responding. Last check: 2007-10-26)
		(In reality, of course, it is not the celestial sphere which rotates, but the Earth.) The two points projected onto the celestial sphere by the extension of the Earth's axis of rotation are called the celestial poles (North Celestial Pole and South Celestial Pole).
		The horizontal plane is drawn for a preselected position on the northern hemisphere; the red arrow represents the north direction, the green one the south direction.
		If you were at the equator, however, the two celestial poles would appear to be on the horizon.
	www.walter-fendt.de /a11e/celpoles.htm (380 words)

	The Celestial Sphere (Site not responding. Last check: 2007-10-26)
		As the observer moves farther north in latitude, the north celestial pole moves closer to the zenith until they become coincident when the observer is at the north pole.
		Stars within an angle between the north pole and the horizon (the observer's latitude) are circumpolar for an observer at northern-hemisphere latitude (of the observer), and stars within the same angle but of the south pole are never seen by such an observer; the reverse is true for an observer in the southern hemisphere.
		The first point of Aries is defined to be the point where the Sun, moving along the ecliptic, crosses the celestial equator from south to north and forms the basis of the most often used celestial coordinate system.
	www.empirenet.com /tajames/astronomy/notes-celestial-sphere.html (2565 words)

	SkyTellers - Polaris - About Polaris
		Polaris, located almost exactly at the north celestial pole, the center of spin, stays in the same place, while stars farther away from the north celestial pole can be seen to move in a wider circle around Polaris as viewed from Earth during its daily rotation.
		The south celestial pole lies in the constellation Octans, and the closest stars in that constellation are very, very dim to the unaided human eye.
		At the north pole (90 degrees latitude) Polaris is overhead at an altitude of 90 degrees.
	www.lpi.usra.edu /education/skytellers/polaris/about.shtml (1130 words)

	celestial pole
		celestial pole, one of the two points at which the earth's axis of rotation intersects the
		of the celestial pole in an observer's hemisphere is equal to the observer's latitude on the earth.
		celestial meridian - celestial meridian, vertical circlepassing through the north celestial pole and an observer's...
	www.factmonster.com /ce6/sci/A0811033.html (182 words)

	North Celestial Pole (Site not responding. Last check: 2007-10-26)
		As a result, their gravitational attraction on the Earth tries to force the equatorial bulge to be as close to them as possible.
		As the Earth precesses, the north celestial pole slowly traces out a circle among the northern constellations.
		At the present time, the north celestial pole is near the moderately bright star Polaris, which serves as the pole star.
	www.wvp-consulting.com /astronomy/polaris.html (103 words)

	Earth Rotation and Equatorial Coordinates
		In practice, celestial coordinates are tied to observed objects because the location of the vernal equinox is hard to measure directly.
		Celestial pole offset and polar motion are observed offsets from the mathematical formulae and are not predictable over long periods of time.
		The dominant motion is the precession of the earth's polar axis around the ecliptic pole, mainly due torques on the earth cause by the moon and sun.
	www.cv.nrao.edu /~rfisher/Ephemerides/earth_rot.html (2028 words)

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