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Topic: Castor (star)

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	Castor (star) - Search Results - MSN Encarta
		Castor (star), a star, Alpha Geminorum, of magnitude 1.6, the fainter star of the zodiacal constellation Gemini, or the Twins (Zodiac).
		Castor and Polydeuces, in Greek and Roman mythology, the twin sons of Leda, wife of the Spartan king Tyndareus.
		Castor (α Gem / α Geminorum / Alpha Geminorum) is the second brightest star in the constellation Gemini and one of the brightest stars in the nighttime sky.
	encarta.msn.com /Castor_(star).html (196 words)

	Castor (star) - Wikipedia, the free encyclopedia
		Castor (α Gem / α Geminorum / Alpha Geminorum) is the second brightest star in the constellation Gemini and one of the brightest stars in the nighttime sky.
		Astronomically, Castor was discovered to be a visual binary in 1719, with the magnitude of its components being 2.8 and 2.0.
		Castor has a faint companion separated from it by about 72" but having the same parallax and proper motion; this companion is also a spectroscopic binary with a period slightly less than 1 day.
	en.wikipedia.org /wiki/Castor_(star) (280 words)

	Castor 6
		Castor Ab is a main sequence dwarf of uncertain spectral type, probably ranging from M5 to brighter ("earlier") type of probable luminosity type V (Golub et al, 1983).
		Castor Ba is a bluish-white main sequence dwarf star of spectral and luminosity type A2-5 Vm.
		Castor Bb is a main sequence dwarf star of uncertain spectral type, probably ranging from M2 to a brighter type ("earlier") -- possibly with metallic lines as well -- and luminosity type V (Golub et al, 1983).
	www.solstation.com /stars2/castor6.htm (2230 words)

	Castor and Pollux - Wikipedia, the free encyclopedia
		In Greek mythology, Castor (or Kastor) and Pollux (sometimes called Polydeuces) were the twin sons of Leda and the brothers of Helen of Troy and Clytemnestra.
		The Dioscuri on the reverse of this coin by the Roman Emperor Maxentius.
		Castor and Polydeuces abducted and married Phoebe and Hilaeira, the daughters of Leucippus.
	en.wikipedia.org /wiki/Castor_and_Polydeuces (651 words)

	Castor
		In Greek mythology, Castor was the son of Zeus and Leda and twin brother of Polydeuces.
		The castor bean is a poisonous spurge seed.
		Castor Oyl is a cartoon character, brother of Olive Oyl.
	www.ebroadcast.com.au /lookup/encyclopedia/ca/Castor.html (182 words)

	Castor (Site not responding. Last check: 2007-10-19)
		B is A5m, that is a somewhat smaller and cooler main sequence star.
		Castor A consists of two almost identical main sequence stars of spectral type A in a rather eccentric elliptical orbit with a period of 9.2 days.
		Castor B consists of two stars revolving in a circular orbit with a period of 2.9 days.
	domeofthesky.com /clicks/castor.html (383 words)

	Prairie Astronomy Club: Double Stars to Follow - Part II by Martin Gaskell
		Castor occupies a famous place in the history of astronomy -- it was the first system beyond the solar system in which gravity was shown to be operating.
		Castor C is interesting because the orbit of the components is edge on causing eclipses of amplitude about 0.5 magnitudes (easily detectable visually).
		The A stars, for example, each seem to be similar to Sirius in spectral type and luminosity, but their masses come out to be about the same as the mass of the sun (Sirius is about twice as massive as the sun).
	www.prairieastronomyclub.org /dblstar2.htm (1428 words)

	What's Up - Constellations (Apr)
		Alpha Geminorum (Castor) is, at magnitude 1.59 the 23rd brightest star in the sky, and is properly referred to as being of the second magnitude as astronomers consider a first magnitude to be from 0.5 to +1.5 - Castor barely falls short.
		Castor is also not the brightest star in Gemini; that honor goes to neighboring Pollux.
		An eighth magnitude star in the telescopic field with Zeta is merely aligned by accident; the stars are in fact nowhere near one another in distance.
	www.sciencecenter.net /whatsup/04/gm-stars.htm (1530 words)

	Gemini: Heavenly Properties
		Castor (also known as the Alpha Gem) and Pollux (also known as Beta Gem), the two major stars, are close together and farthest to the left of this constellation, representing the heads of the Twins.
		Castor, blue-white in color, was the first star to be recognized as a binary or double pair, one of which is slightly brighter than the other.
		The Ancients considered Castor and Pollux to be equally brilliant, but today, astronomers have noted that Pollux has become somewhat brighter and it is believed that this star may possibly be reaching the point where it expands to a red giant...thus finally ending its life cycle.
	www.novareinna.com /constellation/geminiheaven.html (428 words)

	Binary and Multiple Star Systems
		The three belt stars of Orion, Mintaka, Alnilam and Alnitak, were imaged (with the ISIS ccd camera, B filter, 0.55 seconds) through a small finder scope (80 mm Celestron refractor attached to the side of the Yerkes 24 inch telescope).
		Albireo is the star at the tail of Cygnus the Swan (or the foot of the Northern Cross).
		The brighter star is south of the dimmer star.
	sunra.lbl.gov /~vhoette/Explorations/BinaryStars (858 words)

	Comparison
		Castor A and B are both shades of blue, within their binary systems, and Castor C has both red dwarfs.
		Castor on the other hand has star magnitudes ranging from 1.9 for Castor Aa to 9.1 for one of the stars in Castor C. Another interesting point to note about these two star systems is that of the type of star system they are.
		Castor is a spectroscopic binary system, which means that the second star is not visible and we only know that it is there due to the wobble in the other star.
	www.eso.org /outreach/eduoff/edu-prog/catchastar/CAS2002/cas-projects/uk_castor_1/comp.html (797 words)

	Gemini the Twins
		Castor and Pollux have been called twin peacocks by the Arabs, twin sprouting plants by the Egyptians, and twin deities by the Hindus.
		Castor raised exceptional horses, and Pollux was a warrior.
		Castor B is also two blue white stars that have a magnitude of 2.9.
	starryskies.com /The_sky/constellations/gemini.html (389 words)

	Castor.
		Castor is a binary, 1.57 and 3.7, bright white and pale white, in Gemini.
		Castor has specific associations with breaking an arm or leg and this may come from the Ptolemaic classification of Castor as a Mercury star, which is much associated with the limbs generally.
		Castor is also noted in natal astrology for proneness to mental breakdowns and neurotic distress.
	www.retnet.net.au /annew/Castor.html (975 words)

	Introduction
		Castor, alongside Pollux, is one of the two brightest stars of the constellation Gemini, and has a fascinating history.
		Castor C is the faintest of the three binary systems in the wavelengths of the visible spectrum, and is also the odd one out.
		Castor C is the outlying pair, being separated from the centre of the AabBab system by a large distance of over 1100 AU.
	www.eso.org /outreach/eduoff/edu-prog/catchastar/CAS2002/cas-projects/uk_castor_1/intro.html (1018 words)

	Castor IV - Summary
		The Castor motor family was originally developed in 1959 to support the NASA Scout and Little Joe vehicles and was designed to provide inexpensive, reliable boosters for small payload launch vehicles.
		The Castor IV solid rocket motor was developed to provide first stage propulsion for the Athena H and was later adapted as a strap-on booster for the Delta launch vehicle.
		The Castor IVB solid rocket motor is a thrust vector controlled version of the IVA used for first or second stage or strap-on boost applications.
	www.spaceandtech.com /spacedata/motors/castor4_sum.shtml (253 words)

	Castor Bean Plant (Site not responding. Last check: 2007-10-19)
		In Greek and Roman legend, Castor was one of the twin sons of Jupiter and Leda.
		Castor wax, a hard wax produced by the hydrogenation (chemical combination with hydrogen) of pure castor oil, is used in polishes, electrical condensers, carbon paper, and as a solid lubricant.
		Castor oil is also used as personal lubricant: It is sometimes applied externally as a soothing emollient for dry skin, dermatitis, other skin diseases, sunburn, open sores, and it is the primary ingredient of several brand name medications.
	waynesword.palomar.edu /plmar99.htm (5293 words)

	Gemini: The Twins?
		Castor was killed in battle with Idas, who was in turn slain by Zeus himself with a lightning bolt.
		The Castor C pair lies nearly twice the apparent diameter of Jupiter to the southeast of the main pair and is of magnitude 9.
		The main pair of Castor A and B is difficult to separate in small telescopes.
	ourworld.compuserve.com /homepages/bmoler/gemini.htm (801 words)

	gemini horoscope
		The two brightest stars, Castor and Pollux, are named after the twin sons of Leda in Greek mythology.
		Castor, a second-magnitude star, is a triple star, and each of its components is a double star--making six stars in all.
		Gemini is located by extending an imaginary line from the two bottom stars in the Big Dipper's bowl away from the handle.
	www.gemini.arollo.com (322 words)

	PSI XMM Page
		Castor, the brightest star in the constellation of Gemini The Twins, is an inconspicuous star of spectral type A; it actually consists of a pair of A-type stars in an orbit with a period of 467 yrs, with an apparent separation of presently 3.9 arcseconds, just resolvable by an amateur optical telescope.
		The brighter of the A stars is accompanied by an invisible dwarf star in a highly eccentric orbit, while the other A star hosts a similar companion but apparently in a circular orbit.
		The lower spectrum is from YY Gem, the upper one from the Castor binary.
	www.astro.phys.ethz.ch /staff/guedel/private/xmm/yygem.html (1081 words)

	The First Binary Star (Site not responding. Last check: 2007-10-19)
		Castor and Pollux, the Gemini twins of mythology, are represented by the two brightest stars on this constellation with Castor shining to the north of Pollux.
		Castor, also known as Alpha Geminorum, may be considered it's first star since alpha is the first letter of the greek alphabet.
		So Castor may be considered the first binary star due to it's historical significance, it's pleasing visual appearance in small telescopes, and it's unusual Bayer's designation.
	ephemeris.sjaa.net /0205/e.html (415 words)

	Star Brothers
		Castor was the spearman, and held a spear in his hand, Pollux was the boxer who clenched his fists.
		Clytemnestra and Castor were the children of the Spartan king and were in the second egg.
		Since Castor was a mortal and could be harmed like anyone else, and Pollux was immortal, Pollux fearing he may harm his brother never used a spear, but only boxed with his fists.
	www.geocities.com /the_dilapidated_one/Hogwarts/The_Classes/StarTwins.htm (664 words)

	Gemini
		Castor (alpha Geminorum) is the slightly dimmer star.
		This star may be as far away as 950 light years, but the combination of visual and absolute magnitudes suggests a much closer star, at only 190 light years.
		In fact, the entire system is comprised of six stars, including a red dwarf, Castor C, which slowly revolves around both Castor A and Castor B. This star is also a variable (and therefore catalogued as YY Gem).
	www.dibonsmith.com /gem_con.htm (925 words)

	Castor (Site not responding. Last check: 2007-10-19)
		The BSC contains 9110 objects, of which 9096 are stars (14 objects cataloged in the original compilation of 1908 are novae or extragalactic objects that have been retained to preserve the numbering, but most of their data are omitted), while the remarks section is slightly larger than the main catalog.
		Castor may be part of a hugely extended, physically related, group of stars called the "Castor Moving Group" that includes Vega, Fomalhaut, Zubenelgenubi, and Alderamin in Cepheus.
		Castor C (YY Gem) is a V=+8.91 pair of nearly identical M1Ve (dMe) stars with P=19h32m spectroscopic/detached eclipsing binary (separation about 4Rsun) that dims 0.75mag during eclipse and one or both are flare stars.
	www.physics.uq.edu.au /people/ross/phys2080/binary/castor.htm (772 words)

	AllRefer.com - Castor, in astronomy, Star (Astronomy: Stars) - Encyclopedia
		Slightly dimmer than Pollux, with which it forms the Twins, Castor has an apparent magnitude of 1.58, which still makes it one of the 25 brightest stars in the sky.
		Castor is actually a six-star system, being a visual triple each component of which is a binary star; the three components are an eclipsing binary and a pair of spectroscopic binaries.
		The two brightest components are white, main-sequence stars of spectral classes A1 and A5.
	reference.allrefer.com /encyclopedia/C/Castor.html (209 words)

	Castor (Alpha Gem)
		The popular multiple star Castor (the Horseman) is one of the bright stars which make up the heads of the twins of the prominent winter constellation Gemini.
		Castor is the northwestern most star of the two, and slightly fainter.
		The average physical separation of these two stars is 118 Astronomical Units (1.0 AU is the mean distance from the sun to the earth).
	www.skyhound.com /sh/archive/feb/Castor.html (453 words)

	ESA Science & Technology: XMM-Newton reveals details of the Castor sextuplet
		The brighter of the A-stars is accompanied by an invisible dwarf in a highly eccentric orbit.
		The Castor family reveals its real splendour in the X-ray domain as XMM-Newton has shown on 25 April when for performance/verification purposes it observed the sextuplet for a full day, using all three EPIC cameras and both Reflection Grating Spectrometers (RGS).
		The EPIC MOS1 image clearly reveals two X-ray sources (Castor B and Castor A) at the position where the two A-type stars are supposed to be.
	sci.esa.int /content/news/index.cfm?aid=1&cid=1&oid=20540 (842 words)

	Castor 120 - Summary (Site not responding. Last check: 2007-10-19)
		The Castor 120 is a medium-size, high-performance solid propellant motor developed in 1989 to fill the gap between motors in the 30,000-pound range and large motors like the Space Shuttle reusable solid rocket motors and the Titan IV solid rocket boosters.
		The first flight of a Castor 120 occurred on August 22, 1997 with the launch of Lockheed Martin's LMLV-1 (Athena) as the first-stage motor.
		The Castor 120's low cost was achieved through advanced design features such as a reduced part count, a reduction in cycle time and a modified propellant grain machining process.
	www.spaceandtech.com /spacedata/motors/castor120_sum.shtml (159 words)

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