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Topic: Elliptical Galaxy M89

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	Elliptical galaxy - Wikipedia, the free encyclopedia
		Larger elliptical galaxies typically have a system of globular clusters, indicating an old population.
		Ellipticals and the bulges of disk galaxies have similar properties, and are generally regarded as the same physical phenomenon
		Elliptical galaxies tend to lie in the cores of galaxy clusters and in compact groups of galaxies.
	en.wikipedia.org /wiki/Elliptical_galaxy (616 words)

	Sea and Sky: Messier Objects M81 - M90
		This galaxy is located some 60 million light years from Earth and is believed to have a diameter of around 125,000 light years.
		This galaxy is unusual in that is appears to be surrounded by a type of enveloping structure which extends 150,000 light years from the galaxy.
		This is one of the larger spiral galaxies in the Virgo cluster.
	www.seasky.org /astronomy/astronomy_messier_81to90.html (1138 words)

	Elliptical Galaxies
		Elliptical galaxies are also named because of their shapes.
		Elliptical galaxies range from circular (remember, a circle is an ellipse!) to long, narrow, and cigar-shaped.
		Elliptical galaxies are denoted by the letter E. They are also given a number from 0 to 7.
	cas.sdss.org /dr4/en/proj/basic/galaxies/ellipticals.asp (149 words)

	What's Up - Deep Sky (May)
		M60 is an elliptical galaxy of type E1/E2, and is magnitude 10, making this one of the brighter galaxies in the area.
		Two fainter elliptical galaxies, NGCs 4476 and 4478, are in the telescopic field.
		M89 is a round ball of stars, an elliptical of type E0, and glows at a faint magnitude 11.
	www.sciencecenter.net /whatsup/05/v-gal.htm (557 words)

	Astronomy Online - Messier Objects
		M32 - a dwarf elliptical galaxy in the constellation Andromeda (a companion to M31).
		M33 - "Triangulum Galaxy" or "Pinwheel Galaxy" a spiral galaxy in the constellation Triangulum.
		M110 - an elliptical galaxy in the constellation Andromeda (a companion to M31).
	astronomyonline.org /Astrophotography/Messier_complete.asp (1478 words)

	Curious About Astronomy? Galaxies
		Galaxies with prominent bulges and pronounced spiral arms are classified as "Sb" (M31, M81) or "SBb" (M95, NGC 4725).
		Though the origin of lenticular galaxies is still debated the most plausible explanation to date is that the gas and stars that would reside in the galaxy disk have been stripped by interactions with the hot gas in clusters and groups of galaxies.
		This irregular class of galaxies is a miscellaneous class, comprising small galaxies with no identifiable form like the Magellanic clouds (the Large Magellanic Cloud and Small Magellanic Cloud are two satellite galaxies of the Milky Way) and "peculiar" galaxies that appear to be in disarray like NGC 1313.
	curious.astro.cornell.edu /galaxies.php (1813 words)

	Elliptical Galaxies (Site not responding. Last check: 2007-10-21)
		The latter are situated especially in the centre of the clusters of galaxies.
		The elliptical galaxies are a lot more homogenous than the spiral ones, both in terms of stellar content and distribution of the stars.
		This is an elliptical galaxy that belongs to the Coma cluster, a large cluster of galaxies, five times farther than the Virgo cluster.
	www.pd.astro.it /E-MOSTRA/NEW/A5003ELL.HTM (255 words)

	M 89 (Site not responding. Last check: 2007-10-21)
		While this galaxy looks like the prototype of a normal E0 galaxy, and was just known as an only weak radio source, Malin's high sensitivity photographs revealed a faint enveloping structure, which is best visible to the northwestern and southern direction of the galaxy.
		Therefore, M89 was the first enveloped galaxy discovered, the envelope being extended to more than 150,000 light years from the galaxy.
		Moreover, a jetlike structure seems to extend to over 100,000 light years distance; this may be a smaller galaxy which is in process of being disrupted by the tidal gravitational force of M89 during an encounter.
	www.messiermarathon.com /new_page_95.htm (205 words)

	eSky: Galaxies
		The largest Local galaxy is M31, the Andromeda Galaxy, which is about 200,000 light years across, a diameter twice that of our own Milky Way Galaxy.
		A typical spiral galaxy, adrift in a still and starless void.
		A galaxy like this, fairly similar to our own Milky Way Galaxy, can easily be several hundred thousand light years across, and carry thousands of millions of stars.
	www.glyphweb.com /esky/concepts/galaxies.html (155 words)

	Galaxies
		Galaxies are large systems of stars and interstellar matter, typically containing several million to some trillion stars, of masses between several million and several trillion times that of our Sun, of an extension of a few thousands to several 100,000s light years, typically separated by millions of light years distance.
		The most massive galaxies are giants which are a million times more massive than the lightest: Their mass range is from at most some million times that of our Sun in case of the smallest dwarfs, to several trillion solar masses in case of giants like M87 or M77.
		Our Milky Way Galaxy, a spiral galaxy, is among the massive and big galaxies with at least 250 billion solar masses (there are hints that the total mass may even be as large as 750 billion to 1 trillion times that of the Sun) and a disk diameter of 100,000 light years.
	www.maa.agleia.de /Messier/galaxy.html (1771 words)

	I
		The ellipticity is defined as e=(a-b)/a where a and b are the semi-major and semi-minor axes of the ellipse.
		an elliptical galaxy which is spherical and hence appears circular in projection onto the plane of the sky.
		Most of the listed galaxies and stars are marked on the large reproduction of the plate but some galaxies in the crowded central region have been omitted for clarity; these are marked on the separate small chart.
	www.astro.livjm.ac.uk /courses/one/PRACTI/GALCLA/GALAX.HTM (1642 words)

	GCSE Astronomy - Messier Objects
		The companion galaxy is thought to be orbiting around the Whirlpool every 500 million years or so, but the orbit is shrinking and the two galaxies will merge after two or three more orbits.
		One of the brightest galaxies in the Virgo Cluster, with a magnitude of 8.5.
		Spiral Galaxy Type Sa Appears to be a part of the Virgo Cluster although not situted near the main concentration.
	members.tripod.com /~BDaugherty/gcseAstronomy/messier.html (1427 words)

	Virgo
		This galaxy is one of the largest elliptical galaxies known.
		The galaxy has a bright center, it is also a strong source of radio emission.
		M89 (NGC 4552) (12h 33.1m +12°50') is yet another large elliptical galaxy in the cluster.
	starryskies.com /The_sky/constallations_html/virgo.html (601 words)

	[No title]
		The simplest extended sources to model and analyze are early-type elliptical galaxies, whose dust-free starlight is well understood in the near and mid-infrared window.
		Early-type elliptical galaxies have very homogeneus properties, resulting in smooth, featureless spectral energy distributions that are dominated by the evolved luminous population.
		Elliptical Galaxy Model Templates after normalization in the K-band (2.2 µm); three spectra are included: K2III, M0III, M2.5III; and equivalent IRAC photometric points shown with magenta triangles (derived from the templates and M-giant spectra).
	spider.ipac.caltech.edu /staff/jarrett/irac/calibration/galaxies.html (989 words)

	Messier 89 - Wikipedia, the free encyclopedia
		M89 is a member of the Virgo Cluster of galaxies.
		The galaxy also features a surrounding structure or gas and stardust extending up to 150,000 light-years from the galaxy and jets of heated particles that extend 100,000 light-years outwards, indications that it may have once been an active quasar or radio galaxy.
		M89 also has a large population of globular clusters as compared to the Milky Way's 150-200, a 2006 survey out to 10′ of its core estimates that there are 2,000 ± 700 globulars within 25′ of M89.
	en.wikipedia.org /wiki/Elliptical_Galaxy_M89 (296 words)

	Brian's Astronomy Website (Site not responding. Last check: 2007-10-21)
		It is located at the end of the "Y" part of Virgo of the side farthest away from the rest of the constellation roughly 28° to the northwest of Spica.
		M90 is one of the brighter spiral galaxies in Virgo at mag 9.5.
		To find the Sombrero galaxy start at Spica then move 4° to the west to Flamsteed 49 (mag 5) from there move west again another 4° to Flamsteed 40 (mag 4.8) M104 is now 4° to the southwest.
	members.shaw.ca /blbattersby/hop/May.html (398 words)

	Sea and Sky's Pictures in the Sky: May Constellations
		These include M64, the Blackeye Galaxy and M100, a spiral galaxy which is the brightest member of the Virgo cluster.
		M51 is known as the Whirlpool Galaxy, and is one of the most beautiful face-on spirals in the sky.
		M64 is a a spiral galaxy known as the Blackeye Galaxy.
	www.seasky.org /pictures/sky7b05.html (968 words)

	Cosmic Voyage-The Online Resource for Amateur Astronomers (Site not responding. Last check: 2007-10-21)
		The magnificent M89, a 9.7 magnitude elliptical galaxy, steals the spotlight this time.
		The brillian M89 is seen 18' to the north of the fainter pair.
		Classified as an elliptical, M89 appears 2' across with a stellar core at 82X in the 10-inch Starfinder.
	hometown.aol.com /billferris/n4550h.html (117 words)

	Elliptical Galaxies (Site not responding. Last check: 2007-10-21)
		Elliptical galaxies are ellipsoidal agglomerations of stars, which usually do not contain much interstellar matter, and look smoothly like small wads in the telescope.
		lenticulars, can hardly be distinguished from (and thus are sometimes misclassified as) elliptical galaxies; this has happened in the past to all four Messier lenticulars, among many others.
		Elliptical galaxies of Messier's catalog: M32, M49, M59, M60, M87, M89, M105, M110
	www.seds.org /messier/elli.html (157 words)

	Cosmic Voyage-The Online Resource for Amateur Astronomers (Site not responding. Last check: 2007-10-21)
		M89 is a 9.7 magnitude elliptical galaxy in Virgo.
		A pair of 9th magnitude stars, one to the northeast and the other to the southwest, mark M89's location.
		The galaxy appears 2' across with a stellar core at 82X in the 10-inch Starfinder.
	hometown.aol.com /billferris/m89.html (102 words)

	[No title] (Site not responding. Last check: 2007-10-21)
		Barred spiral galaxy M91 is of the Virgo Cluster of Galaxies and of type SBb.
		M89 is nearly spherical, and it appears to be smoothly textured.
		A spiral galaxy with a prominent dust lane.
	www.slooh.com.cob-web.org:8888 /include/msn_sched_iframe.php (1616 words)

	Alpha Centauri's Universe: Quick Tour Of Ellipitcal Galaxies
		Most of the galaxies known to us are elliptical galaxies.
		Elliptical galaxies do not have arms and are found to be either nearly circular in shape (E0), or extrememly stretched and flattened out similar to that of a cigar (E7).
		Hubble divided the elliptical galaxy classification into eight sub-classifications, E0 through E7: E0 - nearly circular, E1 - a little stretched, E2 - elongated, E3 - more elongated and flattened, E4 - even more elongated and flattened, until we reach E7 which is extrememly elongated and flattened.
	www.earthandspace.info /contents/quick16.htm (95 words)

	May 1998 Newsletter
		Just over ¾° NE of M89 at the border of Virgo and Coma Berenices is the Sb+ spiral galaxy M90 (NGC 4569); it appears as an elongated oval with a bright core.
		Move 1° SW from M90 to the giant elliptical galaxy M87 (NGC 4486), this galaxy is huge containing 780 billion solar masses.
		This is another giant elliptical galaxy with a total mass of about one trillion suns.
	astro.sci.uop.edu /~sas/Newsletter/CON_Virgo.html (937 words)

	Hawaiian Astronomical Society - Virgo
		The Markarian Chain of galaxies sits at the center of the Virgo Cluster of Galaxies.
		This is probably the richest area of the Virgo Supercluster of galaxies.
		NGC5068 (Bennett 59a) anchors a trio of galaxies near the Hydra border, 2° north of Gamma Hydrae.
	www.hawastsoc.org /deepsky/vir/index.html (2020 words)

	Messier Object 89
		M89 is another member of the Virgo cluster of galaxies, and one of Charles Messier's own discoveries.
		He cataloged it on March 18, 1781, together with seven other newly discovered galaxies in the Coma-Virgo region (i.e., Virgo Cluster members), and globular cluster M92, to make this his most successful discovery day.
		M89 is of elliptical type and nearly exactly circular, and it appears to be smoothly textured.
	www.seds.org /messier/m/m089.html (207 words)

	Galaxy Quest
		The core of M86 was not as bright as M84 and the galaxy itself seems a tad bigger.
		This galaxy was round with a bright core.
		M88, M89, M90, and M91 were all new objects to be marked in my notes.
	www.mindspring.com /~jeffpo/galquest.htm (1477 words)

	Elliptical galaxy M89 (NGC 4552) (Site not responding. Last check: 2007-10-21)
		The elliptical galaxy Messier 89 (NGC 4552) in Virgo, shown in an R-band CCD image obtained with the UA 16-inch telescope.
		M87 lies 1.3 degrees to the west, M58 is a degree to the southeast, and wide-field eyepieces may show M90 in the same field only 40 arcminutes to the north.
		M89 has attracted attention because of its active nucleus.
	www.astr.ua.edu /gifimages/m89.html (121 words)

	Utah Skies Astronomy Resource \| The Amateur Astronomer's Resource (Site not responding. Last check: 2007-10-21)
		Known as The Virgo Cluster of Galaxies, this area is home to almost a dozen Messier galaxies in Virgo alone.
		M49 was the first member of the Virgo Cluster of Galaxies discovered, by the French astronomer, Charles Messier.
		This is another of the giant galaxies located near the heart of the Virgo Cluster.
	www.utahskies.org /deepsky/constellations/virgoMain.html (1345 words)

	The 'jet' associated with M89 (Site not responding. Last check: 2007-10-21)
		One of the early successes of the photographic amplification technique was the discovery of the peculiar nature of the Virgo cluster galaxy Messier 89 (NGC 4552).
		Nature paper where this was announced it was described as a jet, but it is more likely the remains of a dwarf galaxy that M89 has absorbed or disrupted.
		This paper was also the first to demonstrate the existence of faint 'shells' around elliptical galaxies, but generality of this discovery was not recognised until a little later.
	www.aao.gov.au /images/general/m89.html (131 words)

	Messier Object 89 (via CobWeb/3.1 planetlab2.netlab.uky.edu) (Site not responding. Last check: 2007-10-21)
		M89 est encore une galaxie membre de l'Amas de la Vierge, et l'une des découvertes personnelles de Messier.
		Alors que cette galaxie a tout du prototype d'une galaxie EO normale, et était seulement connue comme une faible radio source, les photographies à haute sensibilité de Malin ont révélé une enveloppe ténue, que l'on distingue mieux vers le nord-ouest et vers le sud.
		De ce fait, M89 a été la première galaxie reconnue comme possédant cette structure, laquelle s'étend à plus de 150 000 années-lumière.
	www.obspm.fr.cob-web.org:8888 /messier/f/m089.html (214 words)

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