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Topic: 47 Ursae Majoris

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	47 Ursae Majoris - Wikipedia, the free encyclopedia
		47 Ursae Majoris (abbreviated 47 UMa) is a 5th magnitude yellow dwarf star in the constellation of Ursa Major.
		The second planet, 47 Ursae Majoris c, orbits further out than planet b, about the distance of the outer asteroid belt in our Solar system.
		The planetary system of 47 Ursae Majoris shares other similarities with our Solar system, too: the ratio between the masses of b and c is 3.34 (3.32 between Jupiter and Saturn), and the ratio between orbital distances of the planets is 0.560 (0.545).
	en.wikipedia.org /wiki/47_Ursae_Majoris (393 words)

	47 Ursae Majoris (Site not responding. Last check: 2007-10-08)
		The orbit of the inner, larger, planet is somewhat eccentric, and carries the planet as roughly 10 percent closer and farther from the star than average.
		47 Ursae Majoris, 46 light years away, is a modest but still-easily visible fifth magnitude (5.10) class G1 hydrogen-fusing dwarf with a temperature almost exactly the same as that of the
		Continuing the solar similarity, 47 Ursae Majoris rotates with a period of 24 days, just slightly less than does the Sun, and has a metal content very much solar, unlike many of the other planet- holding stars.
	www.astro.uiuc.edu /~kaler/sow/47uma.html (279 words)

	Encyclopedia: Big Dipper
		47 Ursae Majoris has a planetary system with three confirmed planets, 2.54 times and 0.76 times the mass of Jupiter.
		In consequence, together with the nearby Ursa Minor, it formed the basis of the myth of Callisto.
		In earlier times, in Greek mythology, Ursa Major was not considered as a bear, and instead its 3 bright stars (situated in the tail) were considered to be apples growing on a tree (sometimes represented by the fainter stars in the remainder of the constellation).
	www.nationmaster.com /encyclopedia/Big-Dipper (848 words)

	47 Ursae Majoris -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-08)
		Its (additional info and facts about spectral type) spectral type, G1 V, is similar to our (A typical star that is the source of light and heat for the planets in the solar system) Sun.
		On the other hand, the planet is still too close to its parent star as its (Movement downward resulting from gravitational attraction) gravitational influence may have prevented formation of any (The 3rd planet from the sun; the planet on which we live) Earth-like planets in the system.
		The second planet, 47 Ursae Majoris c, orbits further out than planet b, about the distance of the outer (The region of interplanetary space between Mars and Jupiter where most asteroids are found) asteroid belt in our Solar system.
	www.absoluteastronomy.com /encyclopedia/4/47/47_ursae_majoris.htm (438 words)

	47 Ursae Majoris
		This companion, 47 UMa b, was the first planet found orbiting another star to fall into the category of a classical Jovian—that is, one which roughly resembles Jupiter in both its mass and orbit.
		The discovery of second planet in the 47 UMa system, 47 UMa c, was announced in 2002, although this finding has not been confirmed by other groups.
		47 Uma was one of the five targets of the Cosmic Call initiative on February 14, 2003.
	www.daviddarling.info /encyclopedia/A/47UrsMaj.html (262 words)

	Two New Planets Discovered (Site not responding. Last check: 2007-10-08)
		The stars that have been catapulted to fame are 70 Virginis and 47 Ursae Majoris, two otherwise innocuous fifth-magnitude stars near the limit of naked-eye visibility in the constellations Virgo and Ursa Major.
		The discovery of the 70 Virginis and 47 Ursae Majoris planets is the result of a project begun in 1987 by San Francisco State University and the University of California, Berkeley.
		Although the planet of 47 Ursae Majoris is cooler, notes Marcy, it may still have a temperate zone where liquid water is possible.
	www.astro.ucla.edu /~kaisler/articles/magazines/2newplanetsSN.html (679 words)

	Extrasolar Visions - 47 Ursae Majoris b
		Like 70 Virginis b and Jupiter, 47 Ursae Majoris b is not likely to have an abundance of water in the atmosphere, although this is not a certainty.
		So the moons of 47 Ursae Majoris b, not as scalded as those of 70 Virginis, and not as frozen as those of Jupiter, exist at a medium.
		The planet orbiting 47 Ursae Majoris is close enough to its sun for liquid water to exist on its moons.
	www.extrasolar.net /planettour.asp?StarCatId=&PlanetId=16 (638 words)

	Ursa Maior (Site not responding. Last check: 2007-10-08)
		Epsilon Ursae Majoris mostra uma linha forte de crómio.
		R Ursae Majoris é uma variável tipo-Mira com um período de 301.62 dias, e uma mudança de magnitude entre 6.5 e 13.7.
		Pode chegar a 47 UMa, seguindo algumas direcções.
	www.ga-esec-pinheiro-rosa.rcts.pt /constelacoes_antiga/ursa_maior.htm (2063 words)

	47 Ursae Majoris
		47 UMa is a yellow-orange main sequence dwarf star of spectral and luminosity type G0-1 V, with about 1.03 times the mass of Sol (47 UMa at exoplanets.org), 1.26 times its diameter (Henry et al, 2000), and (1.54 +/- 0.13) times its luminosity (Cuntz et al, 2003).
		Recently, astronomers at the University of Texas at Arlington performed refined calculations to determine that the habitable zone around 47 Ursae Majoris, where an inner rocky planet (with suitable mass and atmospheric gas composition and density) can have liquid water on its surface, lies between 1.05 and 1.83 AUs of the star.
		A terrestrial planet orbiting 47 Ursae Majoris at around the first inner tenth of the orbital distance of the calculated habitable zone would have an average orbital distance just under 1.13 AU, between the orbits of Earth and Mars in the Solar System.
	www.solstation.com /stars2/47uma.htm (876 words)

	Ursa Major
		Ursa Major is a large sprawling constellation, the third largest in fact.
		Dubhe (Alpha Ursae Majoris) is a well-known binary, with a close 4.8m companion which orbits every 44.66 years.
		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)

	Encyclopedia: List of nearest bright stars
		Alpha Centauri B (also Rigel Kentaurus B â€” the foot of the centaur in Arabic) is a star of the Alpha Centauri star system.
		The position of Sirius Sirius (Î± CMa / Î± Canis Majoris / Alpha Canis Majoris) is the brightest star in the nighttime sky, with a visual apparent magnitude of âˆ’1.
		Jump to: navigation, search The Bayer designation Pi Ursae Majoris (Ï€ UMa / Ï€ Ursae Majoris) is shared by two stars, Ï€Â¹; Ursae Majoris and Ï€Â² Ursae Majoris, in the constellation Ursa Major.
	www.nationmaster.com /encyclopedia/List-of-nearest-bright-stars (3020 words)

	washingtonpost.com: Planetary System Found Similar to the Sun's
		Such orbits, which tend to freeze and heat the planet to extremes of temperature as it dives close to a star and then pulls far away, are poor candidates for life to gain a foothold.
		By focusing extremely precise measuring techniques at 47 Ursae Majoris, which is about 45 light years (more than 200 trillion miles) away, astronomers measured wobbles of 36 feet per second -- about the speed of a human sprinter -- and inferred the presence of one of the large planets.
		Astronomers said it was possible the large planets around Ursae Majoris could crowd out smaller ones but that large planets often imply the presence of smaller, Earth-like ones.
	www.washingtonpost.com /ac2/wp-dyn/A15988-2001Aug15?language=printer (955 words)

	47 Ursae Majoris (Site not responding. Last check: 2007-10-08)
		Majoris Software and application development services for corporate customers.
		genitive singular, dative singular and nominative plural of ursa
		It uses material from the Wiktionary page "Ursae".
	www.serebella.com /encyclopedia/article-47_Ursae_Majoris.html (90 words)

	Select objects in Ursa Major
		Lying about 46 light-years away and shining in our sky at only about magnitude +4.4, 47 Ursae Majoris (47 UMa) escaped mediocrity in 1996 when astronomers Geoffrey Marcy and Paul Butler announced that this Sun-like star shows strong evidence that it is orbited by a Jupiter-sized planet.
		The suspected planet which may orbit 47 UMa is at least 2.4 times more massive than Jupiter and orbits the star once every 3 years from a distance of about 2 AU, which is just a little farther than Mars orbits our Sun.
		But 47 UMa is unique in that the position of the Jupiter-sized planet resembles our own solar system more closely than the other planetary systems discovered.
	geocities.com /~smalltelescope/constellations/ursamajor/ursamaj3.html (1220 words)

	Ursa Major - Biocrawler definition:Ursa Major - Biocrawler (Site not responding. Last check: 2007-10-08)
		W Ursae Majoris is the prototype of a class of contact binary variable stars, and ranges in magnitude between 7.75m and 8.48m.
		It’s a not-too-well known fact that the Sun and its planets are located in a somewhat enriched region of the Milky Way Galaxy, from the point of view of stellar populations and especially prevalence of bright stars in the vicinity.
		The Ursa Major group a real star cluster in space, which would be noticeable from any given direction for a distance of at least several hundred light years.
	biocrawler.com /biowiki/Ursa_Major (1544 words)

	Extrasolar Planets - 47 Ursae Majoris
		47 Ursae Majoris b is a rather promising world, orbiting its parent star at a distance where liquid water may still exist.
		But 47 Ursae Majoris b is a cold world, though.
		Not as dry as with 70 Virginis b and not as frozen as with Jupiter, the moons of 47 Ursae Majoris b would be something in between.
	www.exoplaneten.de /47uma/english.html (204 words)

	StarGen - Solar System Generator
		These are both seen in the 61 Ursae Majoris system number #401 in the examples.
		47 Ursae Majoris's problem is that it is believed to have multiple Jovian planets already, one of which is too close to the habitable zone to allow for multiple stable orbits within the zone.
		Thus, while 47 Ursae Majoris might have 1 habitable planet, 2 is unlikely.
	home.comcast.net /~brons/NerdCorner/StarGen/StarGen.html (3015 words)

	Extra solar planets: Gas giants, Space Art, 51 Pegasi, 55 Cancri, Tau Bootis, 47 Ursae Majoris, 70 Virginis
		47 Ursae Majoris b (47 UMa b for short) and 47 Ursae Majoris c (47 UMa c for short).
		There is a huge gap between the star and 47 UMa b, void of gas and dust.
		Space art 3: This is the extrasolar planet 47 Ursae Majoris c, the second planet of the system.
	www.novacelestia.com /space_art_extrasolar_planets/gas_giants.html (2584 words)

	-- Beliefnet.com
		The final intriguing finding about the solar system of 47 Ursae Majoris is that its protected inner area is about the same breadth as that of our solar system.
		The gas giants of 47 Ursae Majoris are so huge that their gravity produces a noticeable stellar wobble.
		So astronomers are now watching 47 Ursae Majoris closely, hoping to detect an Earth-like planet in the second possible way — if one should make a transit directly across the face of its star, allowing researchers to glimpse a small darkened disk against the glow.
	www.beliefnet.com /story/92/story_9264_3.html (510 words)

	Extrasolar Planets - 47 Ursae Majoris (Site not responding. Last check: 2007-10-08)
		47 Ursae Majoris b es un mundo prometedor ya que orbita su estrella principal a una distancia donde el agua líquida puede existir.
		No obtante, 47 Ursae Majoris b es un mundo frio ya que al girar alrededor de su estrella al doble de la distancia que la Tierra del Sol, podría ser tan frio como Marte.
		Con una masa más del doble de la de Júpiter, 47 Ursae Majoris b podría tener lunas del tamaño de la Tierra, las cuales, al haberse formado a gran distancia de su estrella, podrían tener un elevado porcentaje de agua y gases volátiles.
	www.exoplaneten.de /47uma/spanish.html (214 words)

	The stability of the orbits of Earth-mass planets in the habitable zone of 47 Ursae Majoris (Site not responding. Last check: 2007-10-08)
		The stability of the orbits of Earth-mass planets in the habitable zone of 47 Ursae Majoris
		Whereas the 47 UMa system as previously known, with just one giant planet, could have Earth-mass planets that remain confined to the HZ for a fairly wide range of initial obital parameters, the second (outer) giant now known to be present has reduced the range significantly.
		There are however confined orbits particularly if either the present eccentricity of the outer giant is close to zero, or the giant masses are close to the minimum values.
	www.edpsciences.org /articles/aa/abs/2002/39/aa2565/aa2565.html (209 words)

	Ursae (Site not responding. Last check: 2007-10-08)
		Brown said the discovery of the 47 Ursae Majoris planet is particularly important...
		The star, known as 47 Ursae Majoris in the Great Bear constellation, is similar to the sun and experts have now found a second planet orbiting it.
		Orbit of the spectroscopic binary Î± Ursae Minoris (1922-1924) (Izvestii¸ a¸¡ GlavnoiÌ rossiiÌskoiÌ astro...
	www.dictionary.cx /Ursae (305 words)

	Soustava 47 Ursae Majoris (Site not responding. Last check: 2007-10-08)
		Nyní oznámený objev nové planety poprvé ukazuje, e slunci podobná hvìzda 47 Ursae Majoris (47 UMa) má soustavu pøinejmením dvou planet na témìø kruhových drahách pøipomínajících Jupitera a Saturna v naí vlastní dobøe známé Sluneèní soustavì.
		Na této umìlcovì ilustraci visí svìty 47 UMa nad drsnou vulkanickou krajinou hypotetického mìsíce.
		Jetì blíe k 47 UMa je dalí malá teèka, hypotetický Zemi podobný vodní svìt.
	www.astro.cz /apod/ap010817.html (207 words)

	Berkeley Astronomers Detect Planet Orbiting Nearby Star
		The star 47 UMa is one of the 100 stars that Marcy and Butler first targeted in 1987 when, in search of evidence for planets, they began collecting data on stellar wobbles.
		The star 47 UMa is a yellow G0V star very similar to the Sun, probably about 7 billion years old and located about 51 light years from Earth.
		The inner planet circling 47 UMa was first discovered in 1996 by Marcy and Butler using their new and precise technique for measuring Doppler-shifted light from stars.
	www.unisci.com /stories/20013/0817011.htm (1149 words)

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