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Topic: Zeta Ursae Majoris

	Zeta Ursae Majoris - Wikipedia, the free encyclopedia
		Alcor has magnitude 3.99 and spectral class A5 V. The two are often called the horse and rider, and the ability to see the second is a traditional test of eyesight.
		In 1996 the components of the Mizar A binary system were imaged in extremely high resolution using the Navy Prototype Optical Interferometer.
		The components are all members of the Ursa Major moving group, a mostly dispersed group of stars sharing a common birth, as determined by proper motion.
	en.wikipedia.org /wiki/Mizar (513 words)

	What's Up - Deep Sky (June)
		Alpha Ursae Majoris (Duhbe) owes it's "alpha" designation not to preeminent brightness (as is usually the case in constellations), but to it's position as the first of the seven stars of the "big dipper".
		Gamma Ursae Majoris (Phecda) forms, with Beta, the bottom of the dipper's handle, and is a blue-white star very similar to Beta: 90 light years away, 75 times as bright as our sun, and also a true member of the dipper cluster.
		Zeta Ursae Majoris (Mizar) is one of the most famous and remarkable multiple stars in the sky, easily located as the middle star in the handle of the big dipper.
	www.sciencecenter.net /whatsup/06/umjstars.htm (2311 words)

	Ursa Major
		Ursa Major is a large sprawling constellation, the third largest in fact.
		Xi Ursae Majoris is far to the south, marking one of the bear's feet.
		R Ursae Majoris is a Mira-type variable with period of 301.62 days, and a magnitude change from 6.5 to 13.7.
	www.dibonsmith.com /uma_con.htm (2546 words)

	Mizar: Facts and details from Encyclopedia Topic (Site not responding. Last check: 2007-10-23)
		Ursa major is a constellation visible throughout the year in the northern hemisphere....
		W ursae majoris (w uma) is a variable star in the constellation ursa major....
		(or ngc 5457) is a spiral galaxy in the ursa major constellation....
	www.absoluteastronomy.com /encyclopedia/m/mi/mizar.htm (1401 words)

	Home - Zeta Ursae Majoris (Site not responding. Last check: 2007-10-23)
		Ursa Major (Ursa Maior in Latin) is a constellation visible throughout the year in the northern hemisphere.
		W Ursae Majoris is the prototype of a class of contact binary variable stars, and ranges in magnitude between 7.75m and 8.48m.
		Several bright galaxies are found in Ursa Major, including the pair M81 (one of the brightest galaxies in the sky) and M82 above the bear's head, and M101, a beautiful spiral northwest of η Ursae Majoris.
	zeta.ursae.majoris.en.infoax.org (9977 words)

	* Alpha Ursae Majoris - (Astronomy): Definition
		Principal stars are: Dubhe - The Bear Alpha Ursae Majoris, magnitude 1.8, a double star; Phecda - Thigh Gamma Ursae Minoris, magnitude 2.4; Merak - Flank Beta Ursae Majoris, magnitude 2.4; Alioth Epsilon Ursae Majoris, magnitude 1.
		The star Dubhe (Scientific Name Alpha Ursae Majoris) is located at right ascension 11h 3.728m and declination 61° 45.050'.
		Dubhe (Alpha Ursae Majoris) is a well-known binary, with a close 4.8m companion which orbits every 44.66 years.
	en.mimi.hu /astronomy/alpha_ursae_majoris.html (145 words)

	Virtual Science Center
		He grabbed the bear by her tail, whirled her around his head (thus stretching out her tail until it was very long) and slung her up into the sky.
		Taking pity on Arcas, Zeus transformed the young hunter into a bear cub, Ursa Minor, and slung him by his tail into the northern sky to join his mother, Ursa Major, where they both continue to guide travelers to this day.
		It is around a point very close to Polaris that the stars rotate overhead in the evening sky throughout the night, and Polaris is commonly used as a navigational star.
	www.chabotspace.org /vsc/planetarium/thesky/constellationlore/ursamajor.asp?rw=yes (892 words)

	Learn more about Mizar in the online encyclopedia. (Site not responding. Last check: 2007-10-23)
		Mizar is a star in the constellation Ursa Major, lying just at the corner of the Big Dipper's handle.
		The name comes from the Arabic Mi'Zar, meaning a waistband or girdle; the Bayer designation of the star is Zeta Ursae Majoris.
		The components are all members of the Ursa Major moving cluster, a mostly dispersed group of stars sharing a common birth, as determined by proper motion.
	www.onlineencyclopedia.org /m/mi/mizar.html (425 words)

	Messier Guide: Early Spring
		The general vicinity is easy to find by extending a line from Gammma Ursae Majoris (Phecda) through Alpha UMa (Dubhe) and continuing on in the same direction for the same distance.
		Under decent suburban skies, the star 24 Ursae Majoris should be visible two degree farther along that same line, past M81, making it much easier to pinpoint the location.
		It fits in a low-power telescopic field with Gamma Ursae Majoris, the bottom left corner of the Dipper's bowl, but it is unlikely to be visible unless that brilliant star is placed outside the field.
	home1.gte.net /vze55p46/id15.html (4456 words)

	Ursa Major (Site not responding. Last check: 2007-10-23)
		Ursa Major, the Greater Bear is the third largest constellation in the sky.
		ε Epsilon Ursae Majoris (12h 54m +55° 58') - Alioth is an average magnitude of 1.8 and is a blue-white, class A0 star, 80 light years distant.
		Mizar B is sixth magnitude and believed to be composed of three type A main sequence stars, but irregularities in the orbital path of Mizar B suggests the presence of yet another star with the period of 57 years.
	starryskies.com /The_sky/constellations/ursa_major.html (2377 words)

	Discovery of the first spectroscopic binary
		In the Third Annual Report of the Henry Draper Memorial, attention is called to the fact that the K line in the spectrum of Zeta Ursae Majoris occasionally appears double.
		The hydrogen lines of Zeta Ursae Majoris are so broad that it is difficult to decide whether they are also separated into two or not.
		The predicted doubling of the lines of Zeta Ursae Majoris on December 8th was confirmed on that day by each of three photographs.
	leo.astronomy.cz /mizar/pickering.htm (831 words)

	Constellations: Ursa Major, The Great Bear
		Principal stars are: Dubhe - The Bear Alpha Ursae Majoris, magnitude 1.8, a double star; Phecda - Thigh Gamma Ursae Minoris, magnitude 2.4; Merak - Flank Beta Ursae Majoris, magnitude 2.4; Alioth Epsilon Ursae Majoris, magnitude 1.8; and Mizar Zeta Ursae Majoris, the most famous double star in the sky, magnitude 2.3.
		Ursa Major, the Great Bear, contains several interesting Messier objects: Bode's Galaxy, M81, one of the brightest galaxies in the sky at magnitude 7.
		According to Greek legend, Ursa Major represents the beautiful Nymph Callisto, who was turned into a bear by the godess Hera, Zeus' wife, because of her love affair with Zeus.
	www.r-clarke.org.uk /constellations/ursa_major.htm (364 words)

	[No title]
		Modelling the simultaneous transit method A period from 2750 to 2350 BC (2550 BC 200 years, double the maximum error margin conventionally estimated for the relative chronologies of this period)7 was examined for pairs of bright stars within 15 degrees from the pole which could have been used in the simultaneous transit method.
		The same procedure was repeated for the pair of stars epsilon -Ursae Majoris and gamma -Ursae Minoris which produced the date 2443 BC (astronomical date -2442).
		Stars epsilon -Ursae Majoris and gamma -Ursae Minoris produce a significantly steeper gradient (line c) which, crucially, cannot be accommodated to the three Giza pyramids (numbers 4-6) which form the most accurately fixed group temporally and spatially.
	saturniancosmology.org /files/pyramids/pyr.txt (3237 words)

	Ursa Major and Ursa Minor
		Ursa Minor was once known as Cynosura (from the Greek for “dog's tail”).
		In the United States part of Ursa Major is called the Big Dipper (or the Drinking Gourd) and part of Ursa Minor, the Little Dipper.
		Ursa Major reaches its highest point in the evening sky in April and Ursa Minor its highest point in June.
	www.factmonster.com /ce6/sci/A0850210.html (442 words)

	* Mu Ursae Majoris - (Astronomy): Definition
		Our Ursa Major, the Greater Bear, contains remnants of ancient Arabic constellations, the best-known example the star Alkaid, which refers to the leader of the daughters of a funeral bier.
		The star Tania Australis (Scientific Name Mu Ursae Majoris) is located at right ascension 10h 22.328m and declination 41° 29.967'.
		The second leap is represented by Lambda and Mu Ursae Majoris, known as Tania Borealis and Tania Australis, while the third leap is represented by Iota and Kappa Ursae Majoris, although Iota alone bears the name Talitha,...
	en.mimi.hu /astronomy/mu_ursae_majoris.html (115 words)

	ASTRONOMICAL FORMULAE, FORMULAE FOR TELESCOPES
		Alpha Ursae Majoris (Dubhe) to Beta Ursae Majoris (Merak).
		Alpha Ursae Majoris (Dubhe) to Eta Ursae Majoris (Alkaid).
		Alpha Ursae Majoris (Dubhe) to Alpha Ursae Minoris
	www.saguaroastro.org /content/formulas.htm (2399 words)

	WILLIAM COOPER & THE THREE BEARS
		Ursa Major and Ursa Minor are the celestial signs, or symbols, of I.O.A. ” [The latter abbreviation is Jehovah sans vowels.] The word bear, as shown in Antichrist in Cancer, is an Anglo-Saxon derivative from
		Ursa Major and Ursa Minor are the celestial signs, or symbols, of I.O.A. ; thus the eagle in the emblems, or Jehovah in the motto, can be translated as the Great or Little Bear, referring again to Arcadia and the Arcadians, to the Ancient British race...
		One of the most famed stars of the sky, second magnitude (2.27) Mizar, 78 light years away, is the Zeta star of Ursa Major, the Greater Bear, the second star in from the end of the handle of the Big Dipper, and the Dipper's fourth brightest star.
	watch.pair.com /cooper-bears.html (4683 words)

	Untitled Document
		Ursa Maior has the form of a big spoon that is emptied out every night: it slowly turns around, scooping up the heavenly water and then releases it over the earth.The image actually is not so rare as we might think...
		It has its similarities in ancient and modern Japan (hokutoshichisei, the ‘northern spoon’) and in North American English, where Ursa Maior is called “the Big Dipper”.One of the early generations of Japanese gods (coming after Izanagi/Izanami) in the Kojiki and Nihon Shoki also represents a name of this meaning.
		Alkaid (Benetnash, Benetnasch, Elkeid): Chief Daughter of the Bier, Eta Ursæ Majoris.
	www.revelation2seven.org /WebPages/SideLinks/SAPTA.htm (4020 words)

	Belt of Venus: Zeta + 80 Ursae Majoris (Struve 1744/Mizar and Alcor)
		The primary of Zeta UMA appeared brilliant blue with what appeared to be a purplish-blue secondary.
		The separation between Zeta and 80 UMA was about half the field of my 10 mm eyepiece, or about 720 arc seconds.
		The close double of Zeta UMA, separated by 14.5 arc seconds is also catalogued as Struve 1744.
	www.perezmedia.net /beltofvenus/archives/000603.html (166 words)

	Some Bright Spring Double Stars
		Often forgotten are the beautiful double stars that also inhabit the spring skies.
		Wnc 4 Ursae Majoris mags 9.0 and 9.3, sep 50”
		Zeta Ursae Majoris (Mizar) mags 2.4 and 4.0, sep 14.4”
	www.theskyscrapers.org /content3490.html (365 words)

	Peoria Astronomical Society: Astronomy Formulas
		The Zeta Ursae Majoris double (Mizar/Alcor) is 11.75'; Epsilon Lyrae is 3'.
		M = D/d where M is the magnification D is the diameter of the objective d is the exit pupil (5-6 mm is best; 7 mm not produce a sharp outer image) The scotopic (dark-adapted) aperture of the human pupil is typically 6 (theoretically 7, 5 if over age 50) mm.
		20o Alpha Ursae Majoris (Dubhe) to Eta Ursae Majoris (Alkaid).
	www.astronomical.org /astbook/form.html (1246 words)

	Mizar, Zeta Ursae Majoris
		The multiple star system zeta UMa (called Mizar - from the arabian word for girdle) belongs to the most famous multiple stars in the sky.
		It's brightness is about 2.4 mag; therefore under very good conditions it is possible for the naked eye to see the 4th mag.
		The Mizar system is a member of the nearby Ursa Major Moving Cluster (Collinder 285)
	www.seds.org /~spider/spider/Doubles/zetaUMa.html (142 words)

	Optical formulae
		M = F/f where M is the magnification F is the focal length of the objective f is the focal length of the ocular At prime focus (ground glass), magnification is 1x for each 25 mm of F
		3=B0 Alpha Ursae Majoris (Dubhe) to Beta Ursae Majoris (Merak).
		20=B0 Alpha Ursae Majoris (Dubhe) to Eta Ursae Majoris (Alkaid).
	www.atmsite.org /contrib/Tasso/formulae (1892 words)

	Deepsky top 100: Mizar and Alcor in Ursa Major
		At the beginning of spring Ursa Major culminates around midnight, a good time to observe Mizar and Alcor.
		Mizar, or Zeta (ζ) Ursae Majoris, is probably the best-known star in the constellation of Ursa Major.
		They are both a member of the Ursa Major Moving Cluster (Collinder 285), but it is unknown if they are a couple that is gravitationally bound.
	www.backyard-astro.com /deepsky/top100/07.html (360 words)

	M101 (Site not responding. Last check: 2007-10-23)
		M101 is an impressive magnitude 7.9 face-on spiral galaxy in Ursa Major.
		Located about 3 degrees northeast of Zeta Ursae Majoris and about 3 degrees northwest of Eta Ursae Majoris, M101 forms an equilateral triangle with the last two stars in the handle of the Big Dipper asterism.
		The optical tube assembly was carried on a Takahashi NJP mount.
	members.cox.net /~sidleach/m101.htm (272 words)

	Orion Press Lexicon On-Line: Subjects Z (Site not responding. Last check: 2007-10-23)
		Zeta Bootis (30 Bootis): a 3.78 magnitude star, 203.7 lightyears from Sol; its third planet (Neural) is class M, although no longer inhabited; see "Neural" (BCH, TOS, TOS tm)
		Zeta Cephei: a K1 luminous supergiant 720 lightyears from Sol (BCH)
		Zeta Reticuli: a double star system composed of yellow G1 and G2 stars; located in Federation space, it lies 40.7 lightyears from Sol; settled by Humans; the primary component (Zeta Reticuli A) has several worlds inhabited by the Weeper plant, Terrestrius manus (BCH, TOS tm, OU)
	www.fastcopyinc.com /orionpress/ReferencesOnLine/lexicon1994-Z.htm (688 words)

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal
		Mizar (Î¶ UMa) is a star in the constellation Ursa Major and is the second star from the end of the Big Dipper's handle.
		Mizar has apparent magnitude 2.27 and spectral class A1 V. With good eyesight one can make out a faint companion just to the east, called Alcor or 80 Ursae Majoris.
		The other stars of the Big Dipper, except Dubhe and Alkaid, belong to this group as well.
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=Zeta_Ursae_Majoris (392 words)

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