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Topic: Circumpolar star

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	Circumpolar star - Wikipedia, the free encyclopedia
		Circumpolar stars are those stars which are located near the poles of the celestial sphere.
		If, from a certain location, a star is near enough to the celestial pole that it never appears to go "under the horizon"; it will therefore be visible (from said location) for the entire night, on every day of the year.
		Some of the most circumpolar stars do not seem to engage in diurnal motion, at all.
	www.encyclopedia-online.info /Circumpolar (193 words)

	AllRefer.com - circumpolar star (Astronomy, General) - Encyclopedia
		Designation of a star as circumpolar depends on the observer's latitude.
		At the North or South Pole all stars are circumpolar, since only one half of the celestial sphere can ever be seen.
		For an observer at any other latitude a star whose declination is greater than 90° minus the observer's latitude will be circumpolar, appearing to circle the celestial pole and remaining always above the horizon.
	reference.allrefer.com /encyclopedia/C/circumpo.html (242 words)

	Naked-Eye Stargazing: Learning the Sky (Site not responding. Last check: 2007-10-21)
		For this reason, star charts, which are always seasonal (because of the big changes in what's visible due to the earth's tilted axis, and the apparent path of the plane of the ecliptic through the skies) are also relevant to the night hour of watching.
		Stars further south than these rise and set as the night progresses; what constellations you can see depends both on the season of your starwatch and the time of night.
		The night toward the beginning may start with the stars as shown in "this month's chart" but will progress with stars sinking and rising to several successive months -- although not exactly, because in earlier and later months, the plane of the ecliptic (hence the zodiac) is going to be in different north-south positions.
	www.kstrom.net /isk/stars/stareye.html (2365 words)

	Circumpolar star -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-21)
		Circumpolar stars are those stars which are located near the (One of two points of intersection of the Earth's axis and the celestial sphere) celestial poles of the (The apparent surface of the imaginary sphere on which celestial bodies appear to be projected) celestial sphere, i.e.
		As the Earth rotates, the sky appears to rotate; and most stars will be hidden below the (A specific layer or stratum of soil or subsoil in a vertical cross section of land) horizon at some point in their circular paths.
		Some of the most circumpolar stars do not seem to engage in (Click link for more info and facts about diurnal motion) diurnal motion, at all.Such a definition implies that different stars can be defined as circumpolar at different Earth latitudes.
	www.absoluteastronomy.com /encyclopedia/c/ci/circumpolar_star.htm (258 words)

	Circumpolar star (Site not responding. Last check: 2007-10-21)
		Circumpolar stars are those stars which are located near the pole s of the celestial sphere.
		For example, to an observer place right at the Earth 's North or South Pole, virtually all the stars are circumpolars.
		G2k's Star Trek vs. Star Wars Technological Assessment An analysis of the combat technologies of Star Trek and Star Wars.
	www.serebella.com /encyclopedia/article-Circumpolar_star.html (614 words)

	* Polaris - (Astronomy): Definition (Site not responding. Last check: 2007-10-21)
		Polaris is a relatively bright star with a magnitude of 2.
		It is a common misconception that the North Star is the brightest in the sky...
		The north star is a star that is located almost due north and is useful for navigation.
	www.bestknows.com /astronomy/polaris.html (1315 words)

	Circumpolar star (Site not responding. Last check: 2007-10-21)
		Circumpolar stars are those stars which are located the poles of the celestial sphere.
		Some of the most circumpolar stars not seem to engage in diurnal motion at all.
		Such a definition implies that different stars be defined as circumpolar at different Earth For example to an observer place right the Earth 's North or South Pole virtually all the stars are circumpolars.
	www.freeglossary.com /Circumpolar_star (386 words)

	circumpolar star - Hutchinson encyclopedia article about circumpolar star (Site not responding. Last check: 2007-10-21)
		The radius of the area around the North Pole in which such stars occur is equal to the latitude of the place of observation.
		Thus at the pole all visible stars are circumpolar, while at the Equator none are.
		From London, England, for example, all stars within 52° of the North Pole are circumpolar.
	encyclopedia.farlex.com /circumpolar%20star (151 words)

	Birth and Death of a Star
		The star collapses under the force of its own weight; if it is a small star, it collapses gently and remains collapsed.
		feather star - feather star, common name of a class of echinoderms that, as juveniles, are attached to the sea...
		variable star - variable star, star that varies, either periodically or irregularly, in the intensity of the light...
	www.factmonster.com /ipka/A0004429.html (414 words)

	Photographic Plate
		Star trails are long duration photographs in which the stars appear smeared from the earth rotating underneath them.
		Place a pen tip in one star hole and rotate the top plate an angular amount that corresponds to the time of a long duration camera exposure.
		For example, to simulate the three-hour photograph of the north circumpolar stars, rotate the top plate counterclockwise 45 degrees while sweeping out the arc with the pen.
	analyzer.depaul.edu /paperplate/photographic_plate.htm (349 words)

	A&B's Astronomy Lab, Fall 2001, No. 2 (Site not responding. Last check: 2007-10-21)
		A circumpolar star at its maximum elevation above the horizon is said to be at its upper culmination.
		These stars are visible at night only during that part of the year when the Sun is in the opposite part of the sky.
		For observers at the Earth's equator, none of the stars are circumpolar and the observers see the whole celestial sphere during the course of a year.
	www.astro.columbia.edu /~archung/labs/fall2001/lec02_fall01.html (1804 words)

	The Motion of the Sky at Different Latitudes
		All the paths of the stars are cut in half by the horizon, so all stars are up half the time, and down half the time, regardless of their position.
		At the Equator, the paths of the stars are vertical, and are cut exactly in half by the ‘horizon’, and since the motions of the stars are ‘uniform’, each and every star is up half the time, and down half the time.
		Some stars are always up, and others always down (similar to the Poles), some are up and down half the time (similar to the Equator), and others are up more than half the time, but not all the time, and others are down more than half the time, but not all the time.
	www.cseligman.com /text/sky/motions.htm (870 words)

	W-M: Archaeo-astronomy and Ancient Alignments
		Zába observes that since the pyramids were oriented to the North by the observation of stars, the position of the Pole must have been obtained by bisecting the angle formed by the two extreme positions of a circumpolar star.
		But it is difficult to observe the exact point of the lowest culmination, because near this point the star moves almost horizontally; furthermore, the impact of refraction would be great in the observation of a circumpolar star at its lowest culmination, since the star would be at a narrow angle with the horizon.
		The five-pointed star at the center of the hemp leaf is a pentagram, slightly distorted to accommodate the stem.
	www.world-mysteries.com /alignments/mpl_al4.htm (4020 words)

	Star Trails Photo Gallery - A
		he graceful arc of star trails across the night sky is one of the easiest astro-images to capture.
		Circumpolar star trails mark the south celestial pole as they circle above native Bolivian mud huts on the shore of Lake Titicaca.
		A long time exposure reveals the motion of the stars against a foreground of reel huts and a scale model of Thor Heyerdal's Ra II.
	www.mreclipse.com /Astrophoto/StarTrailsA.html (396 words)

	Zoom Astronomy Glossary: C
		The brightest star in Canis Venatici is Cor Caroli (alpha CVn), a blue-white star (magnitude 2.9) with a companion star (magnitude 5).
		A circumpolar star is one whose apparent path seems to circle a celestial pole.
		The globular cluster NGC 1851 and the blue magnitude 5 star (mu Col, a "runaway star") are in Columba.
	www.enchantedlearning.com /subjects/astronomy/glossary/indexc.shtml (5820 words)

	APAS 1010 Problem Set 1 (Site not responding. Last check: 2007-10-21)
		In Boulder the altitude of the north pole is 40 degrees.In the skies of Boulder, a star that is less than 40 degrees from the pole never sets and is known as a circumpolar star, and its constellation is a circumpolar constellation.
		The declination of a star on the celestial sphere is its angle above or below the celestial equator.
		In Boulder the range of declinations of stars that are circumpolar is 50-90 degrees.
	www.colorado.edu /APAS/APAS1010/problems/set1.html (726 words)

	W-M: Finding Cardinal Points
		Spence identifies that method as the observation of two stars in simultaneous transit — that is, two stars on exact opposite sides of true north which appear to rotate around it.
		By running computer simulations of the night sky back to the time of the Egyptian kingdoms, she has identified the stars that were most probably used — Mizar and Kochab — one each from the constellations of The Great and The Little Bear, which had simultaneous transits in 2467 BC.
		She took an existing proposal that a vertical alignment between two stars was used to identify North, and attempted to correlate the slow drift of this particular pair of stars with the slight clockwise variation in alignments found on pyramids of sequential construction dates.
	www.world-mysteries.com /alignments/mpl_al3.htm (3471 words)

	The Official Graham Hancock Website: Forum (Site not responding. Last check: 2007-10-21)
		On the question of whether Kate Spence was aware of my work before she submitted her article to nature, I would like to present further evidence of where and when I presented my ideas about using circumpolar stars in Ursa Major and Minor to infer a precise construciton date for the Great Pyramid.
		The subject matter concerns the Great Pyramid and the alignment of the northern shafts from the King's Chamber and Queen's Chamber towards the circumpolar stars.
		It seems that the ancient Egyptians saw the northern stars, particularly the Big and Little Bear, as the overseers of the sky.
	www.grahamhancock.com /forum/BauvalR1-p2.htm (712 words)

	ATMoB: Christmas Mystery (Site not responding. Last check: 2007-10-21)
		From past internet postings, I had known that the ISR has no legal claim or right to actually name stars, but hey, this was a present from Mom, and you do get this fuzzy, warm feeling seeing a red-circled star on a chart which for all perpetuity is 'yours'.
		The dimmest star plotted in his atlas is "greater than 9.5", and 'my' star was about mag 10.8.
		The star (10 4565 821) does indeed exist, and the coordinates were epoch 1983.340.
	www.atmob.org /Articles/ISR.html (493 words)

	Circumpolar Constellations--Astronomy for Families
		The circumpolar stars are called that because they circle the pole, or the pole star.
		The point in the sky around which the done of the sky appears to rotate is the Pole Star or Polaris in the Northern Hememisphere.
		However the portion of the sky that is circumpolar depends upon your latitude.
	www.geocities.com /Heartland/Fields/8616/circumpolar.html (809 words)

	THE COLLECTOR’S GUIDE: STAR AXIS
		Star Axis has to feel as if it has grown from the Earth—that it is not imposed, but found in place.
		Star Axis is still under construction and generally closed to the public.
		Donations for Star Axis are being received by the College of Santa Fe, a nonprofit educational organization (501 C 3).
	www.collectorsguide.com /sf/sffa07.shtml (1170 words)

	Catch a Star
		From our observation spot we had a limited range of variable stars that were circumpolar and out of these stars we chose the variable star Lambda Cygni.
		It is possible that Lambda Cygni is an eclipsing variable, which means that the one member of the double star system passes directly in front of its companion star during its orbit.
		When this happens, light from the companion star is blocked and the binary star appears fainter to observers on Earth.
	www.eso.org /outreach/eduoff/edu-prog/catchastar/casreports-2004/rep-215/udstyr (466 words)

	Circumpolar Star Trails (Site not responding. Last check: 2007-10-21)
		The further the star is from Polaris, the longer the arc it will make.
		This particular image was a 1-1/2 hour exposure on Fujicolor 400 film using a Nikon F3 and a 24mm f/2.8 lens set at f/4.
		The sky color comes from light pollution from cities in that direction which is normally greenish, but which I have shifted toward a more pleasing purplish-blue, to mimic late twighlight even though this image was recorded around 3 o'clock in the morning.
	www.imaginationbox.com /steve/astro/stars.htm (80 words)

	Our view of the sky : Planet Earth : GCSE Astronomy : E-learning : Learning : National Maritime Museum
		From the ground, the stars appear to move in daily circles around the celestial poles as the Earth rotates.
		In the northern hemisphere, a star reaches its maximum altitude when it culminates or crosses the meridian between the celestial pole and the southern horizon.
		In the southern hemisphere, a star culminates when it crosses the meridian between the celestial pole and the northern horizon.
	www.nmm.ac.uk /server?show=conWebDoc.5462&viewPage=3&outputFormat=print (295 words)

	TIME, MEASUREMENT OF - Online Information article about TIME, MEASUREMENT OF (Site not responding. Last check: 2007-10-21)
		The alt-azimuth is first directed to one of the standard stars near the pole, such as a or S Ursae Minoris, using whichever is nearest to the meridian at the time.
		independent of instrumental errors, some standard stars nearly on the parallel of the moon are observed at the two stations; these " moon-culminating stars " are given in the ephemerides in order to secure that both observers take the same stars.
		In the determination of the difference of longitude between Potsdam and Greenwich in 1903 the two observers with their instruments exchanged stations in the middle of the operations, and the sum of their personal and instrumental equation was o•000^ with a probable error of to•oo3''.
	encyclopedia.jrank.org /THE_TOO/TIME_MEASUREMENT_OF.html (6650 words)

	circumpolar - Hutchinson encyclopedia article about circumpolar (Site not responding. Last check: 2007-10-21)
		The amount of sky that is circumpolar depends on the observer's latitude on Earth.
		At the Earth's poles, all the visible sky is circumpolar, but at the Earth's Equator none of it is circumpolar.
		Two months earlier we should have had perpetual daylight in these latitudes; but already we had had three or four hours of night, and by and by there would be six months of darkness in these circumpolar regions.
	encyclopedia.farlex.com /circumpolar (161 words)

	[No title]
		Be able to locate and identify in the sky, on star maps, on a planisphere, and on constellation sketches the brightest stars and other objects easily visible during the term (a specific list will be provided by your instructor).
		Once on the roof, locate a star or other bright object that is in the east or west and fairly low in the sky.
		The circumpolar stars are those stars in the sky that never set and appear to circle around the North Celestial Pole (NCP).
	www.phy.cmich.edu /people/williams/lab-ast-112/lab11.doc (740 words)

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