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Topic: Mu Arae

	Mu Arae - Encyclopedia, History, Geography and Biography
		Mu Arae d at the time of its discovery was the least massive extrasolar planet found around a main sequence star.
		Mu Arae b is at least one and a half times the mass of Jupiter and orbits within the star's habitable zone.
		Mu Arae c was announced on June 13, 2002.
	www.arikah.net /encyclopedia/Mu_Arae (615 words)

	Mu Arae - Biocrawler (Site not responding. Last check: 2007-11-03)
		Mu Arae (μ Arae, abbreviated μ Ara) is a 5th magnitude yellow-orange G-type star similar to our Sun.
		At least three extrasolar planets have been discovered orbiting μ Arae, including one which scientists believe to be the first rocky extrasolar planet discovered around a main sequence star.
		According to current models of planet formation, ESO scientists believe that μ Arae d is likely to be a rocky planet, not a gas giant; 14 Earth masses is theoretically the maximum size for a terrestrial planet.
	www.biocrawler.com /encyclopedia/Mu_Arae (585 words)

	Mu Arae
		Mu Arae is estimated to be slightly more massive than our Sun at around 1.10 solar masses.
		Based on observed activity levels, the age of Mu Arae is estimated to be around 6,410 million years or 1,450 million years, depending on the theoretical model used.
		Mu Arae has a listed spectral type of G3IV–V. The G3 part means the star is classified as yellow in colour, similar to our Sun (a G2V star).
	www.danceage.com /biography/sdmc_Mu_Arae (1332 words)

	Mu Arae (Site not responding. Last check: 2007-11-03)
		The circle shows the location of the class G subdwarf-dwarf Mu Arae (in the constellation Ara).
		Mu Arae is a fifth magnitude (5.15) class G (G3) subdwarf-dwarf (implying it has given up core hydrogen fusion or is about to) that lies at a distance of 50 light years.
		Like the majority of planet-holding stars, Mu Arae is metal-rich, with an iron content (relative to hydrogen) that is double solar.
	www.astro.uiuc.edu /~kaler/sow/muara.html (361 words)

	Mu Arae
		It lies in the northeastern corner (17:44:8.7-51:50:2.6, ICRS 2000.0) of Constellation Ara, the Altar -- southeast of Alpha Arae, south of Lambda Arae, southwest of Theta Arae, and northeast of Beta Arae.
		Mu Arae is a yellow-orange dwarf star of spectral and luminosity type G3 V-IV.
		The orbit of an Earth-like planet (with liquid water) around Mu Arae may be centered around 1.3 AU -- between the orbital distances of Earth and Mars in the Solar System -- with an orbital period around 1.31 years (478 days).
	www.solstation.com /stars2/mu-arae.htm (1076 words)

	Print the story
		The new exoplanet orbits the bright star mu Arae located in the southern constellation of the Altar.
		This solar-like star is located in the southern constellation Ara (the Altar) and is bright enough (5th magnitude) to be observed with the unaided eye.
		Mu Arae was already known to harbour a Jupiter-sized planet with a 650 days orbital period.
	www.physorg.com /printnews.php?newsid=950 (737 words)

	"New Worlds: Extrasolar Planetary Systems" (Site not responding. Last check: 2007-11-03)
		Mu Arae is a Sun-like star in the southern hemisphere constellation Ara the Altar.
		Mu Arae B was the first planet of Mu Arae to be found, but it is now known to be the third planet in order out from the star.
		Mu Arae E was the fourth planet discovered, but it is first in order out from the star.
	members.aol.com /dsfportree/extrasolar.htm (4459 words)

	DropTeam Star System and Planetary Overviews
		The Rim was settled by and flourished under free-minded separatists from the Entente, but eventually Mu Arae fleets and marines attempted to “reintegrate” the worlds of The Rim by force, leading to hundreds of years of conflict which left all of the worlds of The Rim largely destroyed and abandoned.
		They were the most outspoken agitators against Mu Arae, not only living their own isolated lives of freedom as did most of The Rim worlds, but also openly recruiting new settlers from within The Entente and disseminating separatist propaganda within the old systems around Mu Arae.
		It was settled by one of the original colonial expeditions directly from Mu Arae, a journey that took fifty years to complete.
	www.battlefront.com /products/dropteam/planets.html (1245 words)

	Mu Arae
		A relatively near, Sun-like star in the constellation Ara around which three planets have been discovered.
		One of these, the discovery of which was announced on Aug. 25, 2004, is only about 14 times the mass of Earth, or about one-third the mass of Uranus.
		However, it is so close to the central star that its surface temperature is expected to be over 1,100°C. Mu Arae is believed to be somewhat older than the Sun and moving into the subgiant phase of its evolution.
	www.daviddarling.info /encyclopedia/M/Mu_Arae.html (215 words)

	Guardian Unlimited \| Life \| Earth-like planet could harbour life
		The planet, the first detected so far that is enough like Earth for life to develop, orbits a star called mu Arae in the southern constellation Altar.
		But the planet that orbits mu Arae every 9.5 days lies at the threshold of the largest possible rocky planets.
		Researchers had already detected one Jupiter-sized companion to mu Arae, and a closer look with their new instrument showed an additional planet.
	www.guardian.co.uk /life/science/story/0,12996,1293976,00.html (263 words)

	First 'Super Earth' Planet Found
		The planet orbits the star mu Arae, which has been monitored by a European team of astronomers using an instrument called HARPS (High Accuracy Radial velocity Planet Searcher), attached to the 3.6-metre telescope at La Silla observatory in Chile.
		The team's original aim was to catalogue stellar pulsations in order to work out the internal structure of the star, but they noticed a regular oscillation that had to have another source - the star was being wobbled by the gravity of a planet.
		Its star, mu Arae, is similar to the Sun, but the planet orbits at less than a tenth of Earth's distance, so it gets a hundred times as much heat and light.
	www.rense.com /general56/supere.htm (358 words)

	Fourteen Times The Earth
		During 8 nights in June 2004, mu Arae was repeatedly observed and its radial velocity measured by HARPS to obtain information on the interior of the star.
		The astronomers were left with only one convincing explanation to this periodic signal: a second planet orbits mu Arae and accomplishes a full revolution in 9.5 days.
		But this was not the only surprise: from the radial velocity amplitude, that is the size of the wobble induced by the gravitational pull of the planet on the star, the astronomers derived a mass for the planet of only 14 times the mass of the Earth.
	www.spacedaily.com /news/extrasolar-04zf.html (1450 words)

	Centauri Dreams » Blog Archive » A Fourth Planet for Mu Arae
		That fourth world makes Mu Arae the second known four-planet system, the other being 55 Cancri, and in both cases the planetary orbits are nearly circular, an architecture not so different from our own Solar System.
		Mu Arae turns out to be a classic case in point.
		Using data from the HARPS (High Accuracy Radial Velocity Planet Searcher) instrument at La Silla to update older observations, the Geneva team is now able to characterize the entire Mu Arae system in greater detail.
	www.centauri-dreams.org /?p=792 (797 words)

	Only 14 Earth Masses! The Hunt for Other "Earths" Heats Up - Planetary News \| The Planetary Society
		At a distance of only 50 light years, the Mu Arae system is very much in our own galactic neighborhood, and with at least three orbiting objects, including the smallest planet ever detected, it looks more like our Solar System than any planetary system discovered as yet.
		The discovery of the planet came as a surprise to Santos’ team, as they were studying the internal composition of Mu Arae, a star unusually rich in heavy elements.
		Follow-up observations confirmed the researchers initial suspicions: a there was indeed a planet orbiting close by Mu Arae and completing each revolution in nine and a half days.
	planetary.org /news/2004/0827_Only_14_Earth_Masses_The_Hunt_for.html (758 words)

	'Super-Earth' spotted in distant sky (Site not responding. Last check: 2007-11-03)
		The planet was spotted orbiting a Sun-like star, mu Arae, which is located in a southern constellation called the Altar and which is bright enough to be seen with the naked eye, they said.
		The so-far unnamed world, which whizzes around mu Arae in just 9.5 days, is the smallest of the estimated 125 so-called extrasolar planets that have been detected so far.
		This makes mu Arae a very exciting planetary system," French astronomer Francois Bouchy was quoted in a statement issued by the European Southern Observatory (ESO).
	www.marsdaily.com /2004/040825160058.kx0tqwmi.html (623 words)

	Astronomers Find Possible "Super-Earth" - SETI Institute (Site not responding. Last check: 2007-11-03)
		A Jupiter-sized planet had earlier been found around mu Arae, and other observations hinted at the possibility of another companion — but the size of that companion and the time it took to orbit the star remained hazy.
		The letter “mu,” the twelfth letter in the Greek alphabet, indicates that the star mu Arae is the twelfth brightest star in the constellation, as seen from Earth.
		A rather dim star, mu Arae is as inconspicuous as its home constellation, which is as unfamiliar to many people as some of the surrounding constellations, with namesakes as diverse as the peacock (Pavo), the telescope (Telescopium), and the carpenter’s square (Norma).
	www.seti.org /site/pp.asp?c=ktJ2J9MMIsE&b=183225 (1078 words)

	Space Today Online - Faraway Planets Orbiting Distance Stars
		The planet discovered by European astronomers orbits the bright star mu Arae, which is seen in Earth's nighttime sky in the southern constellation Ara (the Altar).
		Astronomers have found hints of yet another another companion near mu Arae, which is about 50 lightyears away from Earth and bright enough to be seen with the unaided eye.
		The planet at mu Arae was discovered with the Harps spectrograph on the European Southern Observatory's 3.6m telescope at La Silla, Chile.
	www.spacetoday.org /DeepSpace/Stars/Planets/NeptunianExoplanet.html (1105 words)

	BBC News Online \| Science/Nature \| Smallest 'Earth-like' planet seen
		The discovery was made using the highly sensitive Harps spectrograph on the European Southern Observatory's 3.6m telescope at La Silla.
		The planet was found to be orbiting the star mu Arae in the southern constellation of Altar.
		According to Francois Bouchy, of the Marseille Astrophysics Laboratory, "not only did the Harps measurements confirm what we previously believed to know about this star, but they also showed that an additional planet on a short orbit was present".
	news.bbc.co.uk /nolpda/ukfs_news/hi/newsid_3599000/3599496.stm (308 words)

	Research - Headlines - Europeans discover extra-light extra-solar planet
		According to the team who made the discovery using the European Southern Observatory (ESO) facilities, it is the lightest known planet orbiting a star other than the Sun –; what the scientists call extra-solar planets or ‘exoplanets’.
		The new planet – arguably the first detected until now that is enough like Earth to sustain life – orbits a star called mu Arae in the southern constellation of Ara (the Altar).
		This observation technique, in which Europeans have a clear leadership, is based on the detection of variations in the speed of the central star and any cyclical changes are evidence of the gravitational pull of an invisible companion or two.
	ec.europa.eu /research/headlines/news/article_04_09_07_en.html (531 words)

	Centauri Dreams » Blog Archive » More Information on the mu Arae Planetary Discovery
		Lots of background on mu Arae’s (second) discovered planet in this press release from the European Southern Observatory.
		The planet previously discovered at mu Arae is roughly Jupiter-size and orbits the star every 650 days.
		The star mu Arae is located in the southern constellation Ara (the Altar) and at 5th magnitude is bright enough to see with the naked eye.
	www.centauri-dreams.org /?p=203 (444 words)

	Finding Super-Earths :: Astrobiology Magazine ::
		The solar-like star mu Arae is about 50 light years away, and is located in the southern constellation Ara (the Altar).
		Planetary candidate "c" is about 1 Jupiter mass, and is 2.3 AU from Mu Arae.
		During eight nights in June 2004, mu Arae was repeatedly observed and its radial velocity measured by HARPS to obtain information on the interior of the star.
	www.astrobio.net /news/modules.php?op=modload&name=News&file=article&sid=1158&mode=thread&order=0&thold=0 (755 words)

	Blogs Ya.com: ¡ No sin mi Rimel !
		Mu Arae Jueves, 26 Octubre 2006 16:08 Enlace Permanente Comentarios (0)
		Mu Arae Sábado, 14 Octubre 2006 20:48 Enlace Permanente Comentarios (5)
		Mu Arae Martes, 19 Septiembre 2006 14:47 Enlace Permanente Comentarios (3)
	blogs.ya.com /nosinmirimel (4072 words)

	Mu - Mizzou: University of Missouri-Columbia (Site not responding. Last check: 2007-11-03)
		Home of Mu Beta Psi, a national honorary co-ed Music Fraternity, one of the oldest in the nation.
		As Mu Arae has become one of the top 100 target stars for NASA's planned Mu Arae is a yellow-orange dwarf star of spectral and luminosity type G3 V-IV.
		The University of Missouri-Columbia (MU) is Missouri's flagship university.
	internetask.com /itna/mu.htm (367 words)

	Planet Quest: News Article
		In other planet-discovery news, astronomers have announced the discovery of a fourth planet orbiting the star Mu Arae (a.k.a.
		The planet is about half the mass of Jupiter and orbits the star at a distance similar to the distance at which the Earth orbits the sun.
		Mu Arae is the second extrasolar system known to host four planets.
	planetquest.jpl.nasa.gov /news/pollux.cfm (282 words)

	systemic - The mu Arae four
		The mu Arae system is remarkable because the two middle planets (with periods P~300 days, planet “d”, and P~640 days, planet “b”) experience strong mutual gravitational interactions during the 5-year time period that the system has been observed.
		The current best fit to the Mu Ara planetary system is almost certainly not the last word on the true system configuration.
		That is, the mu Arae posts and fits so far have been based on data set “HD160691_M04P06CH” so that we could get an exact comparison with the Pepe et al results.
	oklo.org /?p=126 (1446 words)

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