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Topic: Beta Persei

	* Beta Persei - (Astronomy): Definition
		Beta Persei (Algol) is a notable EA type eclipsing binary, changing from 2.12 to 3.39 every 2.8673 days (2d, 20h 48m 56s) as the companion eclipses the primary.
		The most famous are beta Persei (Algol), which varies from 3.4 to 2.1 over 2.87 days, and gamma Persei, which varies by three magnitudes over 14 years.
		The most spectacular of these "variable stars" is "Beta Persei", also known as "Algol", which dims perceptibly for a short time on a very regular schedule of 69 hours.
	en.mimi.hu /astronomy/beta_persei.html (342 words)

	Perseus (constellation) - Wikipedia, the free encyclopedia
		Perseus' body is formed by the stars beta Persei, kappa Persei, iota Persei, alpha Persei, sigma Persei, nu Persei, and epsilon Persei.
		The stars alpha Persei, gamma Persei, tau Persei, and iota Persei form Perseus' head: gamma Persei is of the third magnitude.
		Stars epsilon Persei, xi Persei, zeta Persei, and omicron Persei form Perseus' left leg and foot: zeta Persei being of the third magnitude.
	en.wikipedia.org /wiki/Perseus_(constellation) (919 words)

	What's Up - Featured Deep Sky Objects
		Delta Persei, at an even 3.00 magnitude, is one of the many blue giant stars in the Perseus pattern, on the opposite (southeast) side of Mirfak from yellow Gamma.
		Epsilon Persei is a magnitude 2.88 superhot star, also about 530 light years away and similar to Delta in many respects, although at spectral type B0 Epsilon is defintely hotter and therefore bluer than Delta's B5.
		Rho Persei is one of the few red stars you'll notice in Perseus; this ruddy giant star is magnitude 3.3, and is located just about 2 degrees south of Algol, making for a fine color contrast pair in binoculars.
	www.sciencecenter.net /whatsup/12/stars.htm (444 words)

	Sheliak, Beta Lyrae (Site not responding. Last check: 2007-10-02)
		As one of the two stars of this system is filling its Roche surface and ellipsoidally deformed, the lightcurve is softened in comparison, e.g., to that of Algol (Beta Persei).
		Beta Lyrae is the prototype of this class of eclipsing binaries, the Beta Lyrae Stars or EB variables.
		Larger telescopes resolve Beta Lyra as an attractive double star with a blue companion of 8th mag.
	www.seds.org /~spider/spider/Vars/betaLyr.html (267 words)

	Highbeam Encyclopedia - Search Results for beta particle (Site not responding. Last check: 2007-10-02)
		beta particle BETA PARTICLE [beta particle] one of the three types of radiation resulting from natural radioactivity.
		Beta radiation (or beta rays) was identified and named by E. Rutherford, who found that it consists of high-speed electrons.
		The T-odd R and D correlations in beta decay.
	www.encyclopedia.com /articles/01411.html (826 words)

	Perseus (Site not responding. Last check: 2007-10-02)
		When flying back (we do not know, whether on the back of Pegasus or by means of winged sandals) he saw Andromeda chained to the rock and saved her from a certain death in the claws of Cetus, the sea monster.
		Alpha Persei - Algenib, Mirfak, 1.8 mag, is a yellow supergiant in the middle of a loose open star cluster known as the moving cluster of Alpha Persei - its members move in the same direction.
		Beta Persei - Algol (Demon Star) is the bestknown eclipsing binary, situated at a distance of 93 light-years.
	www.avastronomyclub.org /const/perseus.htm (252 words)

	HOA: HOA Materials
		Algol (beta Persei) is the brightest eclipsing binary in the sky, and the most famous of the eclipsing variable stars.
		Gamma Persei consists of a cool, giant G8 primary star in orbit with a hot, main-sequence A2 secondary.
		Gamma Persei was resolved into its two components for the first time in 1973, and it was extensively analyzed in 1987.
	hoa.aavso.org /algol.html (1181 words)

	YourArt.com >> Encyclopedia >> Algol (Site not responding. Last check: 2007-10-02)
		{{Starbox end}} Algol (Î² Per / Beta Persei) is a bright star in the constellation Perseus.
		It is one of the best known eclipsing binaries, the first such star to be discovered, and also one of the first (non-nova) variable stars to be discovered.
		In the Middle Ages it was one of the 15 Behenian stars, associated with the diamond and hellebore, and marked with the kabbalistic sign.
	www.yourart.com /research/encyclopedia.cgi?subject=/Algol (530 words)

	AstronomyNZ - Star Data North
		The crater, 15 light years in diameter, is located on the edge of a vast dark cosmic cloud of dust and gas 1500 light years away.
		The cluster, which is 368 light years away, is immersed in a cloud of dust and ice crystals that reflects the blue light of the brightest stars.
		(Beta Geminorum) magnitude 1.09, is the nearest red giant (K0 III) and is 30.5 times brighter than the Sun.
	www.astronomynz.org.nz /nightsky/star_charts/bright_stars_north.htm (1107 words)

	Binary Stars "Flare" With Predictable Cycles
		The survey focused on the binary star systems Beta Persei and V711 Tauri -- both are about 95 light-years from Earth.
		Beta Persei is the prototype of the "Algol" class of interacting binary stars.
		In Beta Persei and V711 Tauri, the cool star spins once every 3 days, compared to once every month in the case of the Sun.
	www.nrao.edu /pr/2002/algol (778 words)

	Perseus the Hero
		Alpha Persei, Mirfak (03h 24 m +49°52m) Mirfak is a white class F5 supergiant, 500 light years distant.
		Beta Persei, Algol (03h 08m +40°57') The name Algol means the head of the demon, and it is associated with the head of Medusa that Perseus killed.
		Epsilon Persei (03h 58m +40°01') This blue-white class B0 star has a magnitude of 2.9 and is about 700 light years distant.
	www.starryskies.com /The_sky/constellations/perseus.html (738 words)

	The Journey
		This was first discovered in the case of beta Persei, after astronomers realized that the more massive primary star in the binary was a main sequence star, and hence was less evolved than its less massive companion.
		The paradox was resolved when astronomers realized that the secondary star in beta Persei was originally the more massive star of the pair, but had previously transferred a lot of material to its companion.
		Tomograms of other systems, like beta Persei, are not as easy to interpret, but they seem to include hydrogen emission from the chromosphere of the cool secondary star, which is similar to the Sun.
	www.astro.psu.edu /users/mrichards/research/journey.html (3414 words)

	QUATAVOLUTION SERIES (15 VOLUMES) -ALPHABETIC CONCORDANCE (Site not responding. Last check: 2007-10-02)
		Ignaco Berosus (Bel-usur) Berthelot, A. beta () decay Beta () Geminorium (Pollux) Beta () Lyrae Beta () Persei (Algol) Beth Mirsim,
		Bel-usur) Berthelot, A. beta () decay Beta () Geminorium (Pollux) Beta () Lyrae Beta () Persei (Algol) Beth Mirsim,
		Pollux) Beta () Lyrae Beta () Persei (Algol) Beth Mirsim,
	www.grazian-archive.com /quantavolution/QuantaHTML/alphabetic/c625.htm (1732 words)

	Binary Starsystems Space Art - Algol, Alpha Centauri, Antares, Beta Lyrae, Rigel, Sirius, Spica
		Beta Lyrae, also known as Sheilak is the second brightest star in the constellation of Lyra, the "Harp".
		Beta Lyrae is a remarkable star in many ways and is set as a prototype to classify other binary starsystems that resemble this one (both ecliptic and ellipsoidal in shape), they are called Beta Lyrae stars.
		Space art 3: The famous binary star Beta Lyrae; It is a system of three stars, where two stars orbit each other closely and a third companion (not seen here) has joined the celestial dance from a distance.
	www.novacelestia.com /space_art_binary/binary_star_systems.html (1873 words)

	Search Results for "ALGOL"
		Algol, in astronomy, (al´gol) (KEY), famous variable star in the constellation Perseus; Bayer designation b Persei; 1992 position R.A. 3h07.7m, Dec. +40°55´.
		It contains the bright star Mirfak (Alpha Persei) and Algol (Beta Persei), a visible variable star of the type known as an...
		Best known of this type is Algol (Beta Persei).
	www.bartleby.com /cgi-bin/texis/webinator/sitesearch?FILTER=&query=ALGOL (241 words)

	Iota Persei
		It lies in the northern part of (3:9:4.0+49:36:47.8, ICRS 2000.0) of Constellation Perseus, the mythical Greek Hero who uses the Gorgon Medusa's severed head to change Cetus into stone.
		As Iota Persei has become one of the top 100 target stars for NASA's planned Terrestrial Planet Finder (TPF), images of this star and its position relative to the Milky Way in Earth's night sky are now available from the TPF-C team.
		The celestial figure of Perseus is thought to held the head of Medusa in his hand, where the star Algol or Beta Persei represents her evil eye.
	www.solstation.com /stars2/iota-per.htm (716 words)

	beta Persei star concept from the Astronomy knowledge base (Site not responding. Last check: 2007-10-02)
		beta Persei star concept from the Astronomy knowledge base
		Algol (7 facts) (beta Per, Demon star) - The most famous eclipsing binary, Algol was probably the first variable star discovered.
		Algol is also an erratic radio source of about 0.5 AU diameter.
	www.site.uottawa.ca:4321 /astronomy/betaPerseistar.html (403 words)

	[No title]
		Beta Pegasi Epsilon Lipi Groombridge Beta Leporis Epsilon Draconis Gamma Aquarii Gamma Reticuli Zeta Sextantis Gamma Kepler Alpha Andromedae It may be of interest to note that the locations of the Rainbow worlds form a particular pattern when diagrammed on the map of HyperSpace.
		Traveling from Zeta Persei (the location of their central trade world), the Druuge met the Utwig at Beta Aquarii.
		Beta Copernicus 1, Gamma Brahe 1, and Gamma Scorpii 1.
	home.flash.net /~dyork/resource.txt (10159 words)

	Algol
		Mirfak, Alpha Persei, while the brightest on the right-hand side is Algol, Beta Per.
		The star immediately to the right of Algol, Rho Persei is also variable.
		Though the variation was discovered in 1667, it was probably known long before that and is probably the reason for the star's bad reputation.
	www.astro.uiuc.edu /~kaler/sow/algol.html (881 words)

	AAVSO: GK Per, November 2000 Variable Star Of The Month
		His first feeling was one of disappointment because he felt sure that this star had been there for some time, escaping his notice, and he grudged the time lost when he might have been regarding it.
		In the year 1901, after GK Persei underwent its classical nova outburst, there was a discovery that excited the astronomical community of the day.
		This energetic star can be found in the region between the famous variable Algol (Beta Persei), and the brightest star of the constellation, Alpha Persei.
	www.aavso.org /vstar/vsotm/1100.stm (2163 words)

	SPA Variable Star Section - - Annual Section Newsletter: April 1999
		Tony Markham Rho Persei 114 Chi Cygni 64 3.
		Except for Beta Lyrae, the phases for the Cepheid and Eclipsing variables have been calculated using the elements in the General Catalogue of Variable Stars (GCVS).
		For example, it seems that Beta Per (Algol) and Lambda Tau were not "caught" near mid eclipse - hence their apparent low amplitudes of variation.
	www.popastro.com /sections/vs/vss1999.htm (3045 words)

	Constellations
		Castor (alpha Geminorum) and Pollux (beta Geminorum) Alhena (gamma Geminorum)
		Rigel (beta Orionis), a blue-white supergiant of mag 0.2
		Algol (beta Persei), an eclipsing binary, varying between mag 2.1 and 3.4
	www.star-names.freeserve.co.uk /constellations.htm (1370 words)

	CANOPUS 03/06 - Variable Stars III (Site not responding. Last check: 2007-10-02)
		The first star of this sort to be discovered, was ALGOL (Ra's al Ghoel) or Beta Persei.
		Its variability was known in the days of the Babylonians and because it was the only star known to vary in brightness, having a period of 2 7/8 days (2,86731 days) it was called the Demon star.
		By measuring the period of variability, the oeriod of revolution of the two stars is obtained.
	www.aqua.co.za /assa_jhb/new/Canopus/Can2003/c036LitU.htm (874 words)

	Beta Particle - ENCYCLOPEDIA - The History Channel UK
		beta particle, one of the three types of radiation resulting from natural radioactivity
		Unlike alpha and gamma particles, whose energy can be explained as the difference of the energies of the radioactive nucleus before and after emission, beta particles emerge with a variable energy.
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	www.thehistorychannel.co.uk /site/search/search.php?word=betapart (283 words)

	Astronomy News
		Algol, (Beta Persei), in the constellation Perseus is nearly overhead at around 10:30 p.m.
		Algol (beta Persei), is predicted to be at minimum at 01:35 on Monday January 9th, 22:30 on Wednesday 11th, and 19:20 on Saturday 14th.
		On each occasion, when the fainter secondary component passes in front of the brighter primary, the star takes a few hours to dim from magnitude 2.1 to 3.4 (easily detectable by the naked eye), and a few more to return to normal.
	www.activeboard.com /forum.spark?forumID=58381&subForumID=150690&action=viewTopic&commentID=4868207&topicPage= (507 words)

	Coeli - Astrogloss, Astronomical Glossary (Site not responding. Last check: 2007-10-02)
		A Red Giant star in the constellation of Taurus with a magnitude of -0.7and spectral type K5 lying at a distance of 76 light years.
		Algol, also known as beta Persei, is a well-known Variable Star, as well as a Binary Star.
		Its light variations, explained by John Goodricke in 1783, are caused by mutual eclipses of two stars moving in orbits around their common centre of gravity, within a period of about 69 hours.
	www.stella2000.com /astrogloss_a.htm (4087 words)

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