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Topic: Upsilon Andromedae

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	Upsilon Andromedae 2
		As Upsilon Andromedae 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.
		Lowrance, J. Davy Kirkpatrick, and Charles A. Beichman) announced that Upsilon Andromedae has a dim stellar companion B that shares the same common proper motion as Star A. Upsilon Andromedae B currently is separated from Star A by around 750 AUs.
		In Greek mythology, Andromeda was rescued from Cetus, the Whale, by Perseus who also married her.
	www.solstation.com /stars2/ups-and.htm (1485 words)

	Upsilon Andromedae - Wikipedia, the free encyclopedia
		Upsilon Andromedae was both the first multiple-planet planetary system to be discovered around a main sequence star, and the first multiple-planet system known in a multiple star system.
		Upsilon Andromedae B is a red dwarf of spectral type M4.5V located at a projected distance of 750 AU from the primary star.
		The innermost planet of the Upsilon Andromedae A system was discovered in 1996 and announced in January of 1997, together with the planet of Tau Boötis and the innermost planet of 55 Cancri A.
	en.wikipedia.org /wiki/Upsilon_Andromedae (902 words)

	Upsilon Andromedae
		Upsilon Andromedae A is a yellow-white dwarf similar to the Sun but somewhat younger, more massive, and more luminous.
		Upsilon Andromedae B is a red dwarf of spectral type M4.5V located approximately 750 AU from the primary star.
		A planet, with about two-thirds the mass of Jupiter, was found around Upsilon Andromedae A by the SFSU group in mid-1996.
	www.daviddarling.info /encyclopedia/U/upsAnd.html (550 words)

	NASA's Spitzer Sees Day And Night on Exotic World
		Upsilon Andromedae b is what's known as a "hot-Jupiter" planet, because it is made of gas like our Jovian giant, and it is hot, due to its tight, 4.6-day-long jaunt around its star.
		Upsilon Andromedae b does not cross behind or in front of its star, but is always in Earth's line of sight.
		Upsilon Andromedae b was discovered in 1996 around the star Upsilon Andromedae, which is 40 light-years away and visible to the naked eye at night in the constellation Andromeda.
	www.spacenewsfeed.co.uk /2006/15October2006_45.html (1204 words)

	Andromeda Constellation (Site not responding. Last check: 2007-10-10)
		The constellation of Andromeda is a heroine in a grand Greek myth of the ancient Ethiopean dynasty.
		This picture of the Andromeda Galaxy's companion Messier 110 is a color composite of CCD images from the 0.9-meter telescope of the Kitt Peak National Observatory, near Tucson, Arizona.
		Upsilon Andromedae (F8 V) in the constellation of Andromeda is located at a distance of 52 Light Years from our Solar system Co-ordinates of Right Ascension: 01 36 48.527 and 41 24 38.71.
	www.wingmakers.co.nz /Andromeda.html (1421 words)

	Extrasolar Planets
		Upsilon Andromedae is a bit brighter and bigger than our Sun but is otherwise similar to it.
		All of Upsilon Andromedae’s planets are made of gas, so life would have to be on their moons (if they had any).
		Upsilon Andromedae’s outer most planet is on the edge of the area where life could develop.
	library.thinkquest.org /J0112188/extrasolar_planets.htm (887 words)

	The Upsilon Andromedae System
		However, in the case of Upsilon Andromedae the novel fact is the idea that various planets exist, and not simply a singular planet revolving around a star.
		As we may observe from the previous analysis, the numbers of the Upsilon Andromedae system are quite relational to the historically significant numbers/fractals of the ancient reckoning systems, as well as to nature which is after all logical.
		Upsilon may be observed today, but as yet we have not actually observed the three planetary bodies (b, c, d) as postulated by the theory.
	www.earthmatrix.com /andromedae/system.htm (2967 words)

	Lab Notes
		Upsilon Andromedae's planets are a very different story.
		Interestingly, though, Upsilon Andromedae's newest planet, a 2 MJ known to astronomers as Upsilon Andromedae C, has an eccentric orbit that carries it from a Venus-like distance in the "summer" of its 242-day year, to an Earth-like one at the height of winter.
		For all we know, Upsilon Andromedae's newest planet could harbor several steamy moons that are friendly to life, and since the place is only 44 light-years away, we may very well go there some day to find out.
	www.scifi.com /sfw/issue111/labnotes.html (1023 words)

	systemic - Console Tutorial #2
		The star Upsilon Andromedae lies roughly 40 light years away in the constellation Andromeda, and it is visible to the naked eye if you know where to look.
		Because of Upsilon Andromedae’s relative brightness and proximity, and because it is fairly similar to the Sun, it was among the original group of 50-odd stars surveyed for planets by Marcy and Butler with the radial velocity technique.
		For Upsilon Andromedae, however, the complexity of the radial velocity data set hints at the presence of several significant planets with different periods.
	oklo.org /?page_id=7 (1618 words)

	Upsilon Andromedae (Site not responding. Last check: 2007-10-10)
		The orbit of this third planet is particular eccentric, the ellipse taking the planet from as close as 1.5 astronomical units to the star to as far as 3.5 astronomical units.
		Upsilon Andromedae is a fourth magnitude star (magnitude 4.09) class F (F8) ordinary dwarf 44 light years away.
		In addition to its planets, Upsilon Andromedae has a faint 12th or so magnitude class M red dwarf (M4.5) binary companion that is at least 750 AU away and takes at least 17,000 years to orbit.
	www.astro.uiuc.edu /~kaler/sow/upsand.html (289 words)

	GO NATURE-TRIPPING - JUNIOR INQUIRER (May 1, 1999)
		None of Upsilon Andromedae's planetary companions are like Earth, and would not be hospitable to earthly life.
		Upsilon Andromedae can be seen with the naked eye in the northern sky from June to February.
		However, Upsilon Andromedae is considered a good candidate for the upcoming Space Interferometry Mission (SIM), a project of the National Aeronautics and Space Administration scheduled for launch in 2005, and aimed at probing nearby stars for Earth-like planets.
	www.inq7.net /junior/may99wk1/jun_main.htm (624 words)

	Las extrañas órbitas del sistema Upsilon Andromedae
		El sistema de Upsilon Andromedae es uno de los más estudiados de los aproximadamente 160 sistemas con planetas descubiertos hasta ahora fuera de nuestro sistema solar.
		Upsilon Andromedae es también una de las pocas estrellas con exoplanetas que ya ha abandonado la secuencia principal, alcanzando el estado de sub-gigante.
		Upsilon Andromedae c es mucho más cercano a nuestra idea usual de un planeta.
	www.astroseti.org /vernew.php?codigo=1166 (2254 words)

	Upsilon Andromedae b has its first weather forecast \| The Open Source Pimp (Site not responding. Last check: 2007-10-10)
		Upsilon Andromedae b is hot the other side is cold.
		This is an interesting exoplanet as it is Close to the size of Jupiter but orbits its star far closer than mercury orbits our sun, making its year a mear 4.6 Earth days.
		The world, known as Upsilon Andromedae b, orbits close into a star that is 380 trillion km from Earth.
	opensourcepimp.com /open_source_pimp_upsilon_andromedae_b_has_its_first_weather_forecast (249 words)

	Extrasolar Visions - upsilon Andromedae d
		Upsilon Andromedae made history recently with the discovery that the star parented not just one planet, but three.
		If this is happening within the upsilon Andromedae system, then great areas of the icy moons of the outermost planet may have been melted smooth by these titanic stellar eruptions.
		On the equator of gas giant upsilon Andromedae d, we float above the main cloud deck of water ice clouds.
	www.extrasolar.net /planet.asp?PlanetID=73 (472 words)

	Extrasolar Visions - upsilon Andromedae c
		Whereas Neptune appears blue from the high levels of methane in the frigid atmosphere, upsilon Andromedae c appears blue for the same reason the sky on Earth does, Rayleigh scattering.
		Smaller members of upsilon Andromedae c’s entourage would be a barren and rocky as Mercury or the moon.
		Too hot for white ice crystal clouds to form, but too cold for the planet to glow red, upsilon Andromedae c is colored blue by Rayleigh scattering.
	www.extrasolar.net /planet.asp?PlanetID=72 (363 words)

	Explaining Eccentricities :: Astrobiology Magazine ::
		The conclusion is based on computer extrapolations from 13 years of observations of planet motions around the star Upsilon Andromedae.
		The planetary system around Upsilon Andromedae is one of the most studied of the 160-some systems with planets discovered so far outside our own solar system.
		Previously, astronomers had proposed two possible scenarios for the formation of Upsilon Andromedae's planet system, but the observational data was not yet sufficient to distinguish the two models.
	www.astrobio.net /news/article1523.html (1405 words)

	Stars with Exoplanets: Upsilon Andromedae
		Upsilon Andromedae b: 0.71 times mass of Jupiter, 4.617 days orbit period.
		Upsilon Andromedae c: 2.11 times mass of Jupiter, 241.2 days orbit period.
		Upsilon Andromedae d: 4.61 times mass of Jupiter, 3.47 years orbit period.
	jumk.de /astronomie/exoplanets/upsilon-andromedae.shtml (128 words)

	[10.01] Dynamical origin of Upsilon Andromedae: disk-planet interaction?
		Upsilon Andromedae, the first multiplanetary system discovered among the main-sequence stars, is much more dynamically stable than the first investigations suggested.
		Direct N-body simulations, treating the inner, short-period planet in a simplified manner, suggest that the system survived in the current state since the epoch of formation ~3 Gyr ago.
		We discuss the possibility that the system's orbits were shaped by the interaction of protoplanets with the protoplanetary disk, in the first few millions of ups And's existence.
	www.aas.org /publications/baas/v33n3/dda2001/40.htm (122 words)

	Centauri Dreams » Blog Archive » Watching the Weather on Upsilon Andromedae b
		Upsilon Andromedae is known to have three planets; the one under study is at least 0.69 as massive as Jupiter, and the authors describe their work on its properties as “…the first demonstration that such planets possess distinct hot substellar (day) and cold antistellar (night) faces.”
		The Spitzer data show that, for Upsilon Andromedae b at least, the temperature differences between day and night side are profound.
		Studying how the Upsilon Andromedae system dims and brightens in synch with the gas giant’s orbit made these results possible.
	www.centauri-dreams.org /?p=855 (890 words)

	Upsilon Andromedae - Wikipedia, la enciclopedia libre
		Upsilon Andromedae (también "υ And" ó "υ Andromedae") es una estrella binaria, aproximadamente a 44 años luz de la Tierra, y de unos tres mil millones de años de edad, dos tercios la edad de nuestro Sol.
		Vista desde la tierra, υ Andromedae está en la Constelación de Andrómeda, y está a unos 10 grados al este de la Galaxia de Andrómeda.
		υ Andromedae fue la primera estrella de la secuencia principal en la que se encontró más de un planeta extrasolar.
	es.wikipedia.org /wiki/Upsilon_Andromedae (370 words)

	Amazon.com: "Upsilon Andromedae": Key Phrase page (Site not responding. Last check: 2007-10-10)
		Upsilon Andromedae 4.6 ti 0.6 ---------------------- HD 217107 ---- ---- --------------- 71 0 1.2 - -------------- Rhol 55 Cancri --------------...
		Characteristics of Planets B, C, and D Orbiting Star Upsilon Andromedae Planet Mass Distance from Upsilon Andromedee Period of Revolution B q of the mass of Jupiter 0.06 AU 4.
		upsilon Nnaroreaae a, c, area a Upsilon Andromedae, a star very similar to the Sun, may have three planets, designated b, c, and d.
	www.amazon.com /phrase/Upsilon-Andromedae (482 words)

	Research & Technology Report 2000 (Site not responding. Last check: 2007-10-10)
		The objectives of this project are to study the dynamical properties of planetary systems that are consistent with the observational data on the three-planet system orbiting the nearby main sequence star Upsilon Andromedae.
		Results show that systems with the planetary masses and orbital parameters that provide the best fit to stellar radial velocity observations made at Lick Observatory through either February 2000 or July 2000 are substantially more stable than systems with the parameters originally announced in April 1999.
		Simulations using the February 2000 parameters are stable for planetary masses as much as four times as large as the observational lower bounds (which are obtained by assuming that the solar system lies in the orbital plane of the Upsilon Andromedae planetary system).
	ameslib.arc.nasa.gov /randt/2000/science/planet9.html (122 words)

	Press Release: NASA's Spitzer Sees Day and Night on Exotic World
		The researchers used Spitzer to determine the temperature variation in the atmosphere of a nearby planet called Upsilon Andromedae b.
		Upsilon Andromedae b was discovered in 1996 around the star Upsilon Andromedae, which is 40 light-years away and visible to the naked eye at night in the constellation Andromeda.
		Upsilon Andromedae is circled by two other known planets located farther out than Upsilon Andromedae b.
	www.spitzer.caltech.edu /Media/releases/ssc2006-18/release.shtml (788 words)

	Scientific FrontLine / NASA's Spitzer Sees Day and Night on Exotic World
		This means it is rotating slowly enough that the same side always faces the star, just as the same side of Earth's tidally locked moon always faces toward us, hiding its "dark side." However, since this planet is made of gas, its outer atmosphere could be circulating much faster than its interior.
		According to the astronomers, the observed temperature difference between the two sides of Upsilon Andromedae b is extreme -- about 1,400 degrees Celsius (2,550 degrees Fahrenheit).
		The planet does not cross behind or in front of its star, but is always in Earth's line of sight.
	www.sflorg.com /spacenews/sn101206_02.html (777 words)

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