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Topic: Lenticular Galaxy M84

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	The Virgo Cluster
		M84 (bottom-left) is a large elliptical galaxy near the centre of the Virgo cluster.
		This list is every galaxy with an angular size greater than 1.8 arcminutes within 7.5 degrees of the centre of the cluster which at a distance of 52 million light years corresponds to every galaxy with a diameter greater than 30 thousand light years within 7 million light years from the centre.
		M49 (middle-centre) is an elliptical galaxy and it is the largest galaxy in the southern half of the cluster.
	www.atlasoftheuniverse.com /galgrps/vir.html (963 words)

	Messier 84 (Site not responding. Last check: 2007-11-04)
		The M84 (also known as Messier Object 84, Messier 84, or NGC 4374) is a lenticular galaxy in the constellation Virgo.
		M84 is situated in the heavily populated inner core of the Virgo Cluster of galaxies.
		Radio observations and images of the Hubble Space Telescope of M84 have revealed two jets of matter shooting out from the galaxy's center as well as a disk of rapidly rotating gas and stars close to the nucleus indicating the presence of a supermassive fl hole of 300 million solar masses in the galaxy's nucleus.
	en.askmore.net /Messier_84.htm (108 words)

	Sea and Sky: Messier Objects M81 - M90
		M84 is a member of the Virgo cluster of galaxies, which contains a total of 16 galaxies in the Messier catalog.
		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 (1115 words)

	M 84 (Site not responding. Last check: 2007-11-04)
		M84 is situated in the heavily populated inner core of the Virgo Cluster of galaxies; it is the very left bright galaxy in our image.
		The other galaxies in this image are: the bright galaxy slightly below and left of the center is M86, while in the upper left is the edge-on spiral NGC 4388, and below it (in the center of the triangle with the 2 Messiers) is starlike NGC 4387.
		As seen in this image, M84 has a nice system of globular clusters, which is however much less crowded than the system of its giant neighbor 1/2 degree south and 2 degrees east, M87, which may mark the center of the Virgo cluster.
	www.messiermarathon.com /new_page_90.htm (372 words)

	SciForums.com - A Barred Lenticular Galaxy (Site not responding. Last check: 2007-11-04)
		Like spiral galaxies, they contain a disk, but like elliptical galaxies, they are usually short on dust, gas, and pretty spiral arms.
		Lenticulars are relatively little studied, possibly because of their seemingly benign nature.
		The image was taken to help determine how lenticular galaxies formed, and what happens in their centers.
	www.sciforums.com /printthread.php?t=6710 (132 words)

	Multiwavelength Messier 84 - Elliptical/Lenticular Galaxy
		Messier 84 is a member of the Virgo Cluster of galaxies, a large and nearby collection of hundreds of galaxies extending over 6 degrees of the celestial sky (about 12 times the diameter of the full moon).
		Some astronomers believe M84 is an elliptical galaxy, while others regard it as a face-on lenticular galaxy.
		This is a consequence of the fact that near-IR light is effective for studying older stars and the fact that elliptical/lenticular galaxies are predominantly populated with such stars.
	coolcosmos.ipac.caltech.edu /cosmic_classroom/multiwavelength_astronomy/multiwavelength_museum/m84.html (624 words)

	Roaming the Deep Sky #11
		Fittingly, we are treated to a similar view when we train our telescopes on a group of galaxies near the center of the Virgo Cluster (and thus the Local Supercluster also) known as Markarian’s Chain (in the upper right corner of this DSS image).
		Nine galaxies are visible in a 50’ field of view and eleven in 1.1 degrees.
		Lenticular galaxies (type SO) are similar to ellipticals in that they contain very little gas or dust and consist primarily of older stars.
	home.insightbb.com /~lasweb/lessons/RDS11-MarkariansChain.htm (1260 words)

	Astr384, Spring 2004: Virgo Cluster, Andrew Jordan
		There are at least fourteen galaxies in the field, although some of them are fairly faint.
		Half of the galaxies in the field are spiral or lenticular, the other half are elliptical.
		This picture is a wonderful case in point for the nonuniform distribution of galaxies in the universe.
	www.calvin.edu /academic/phys/observatory/images/Astr384.Spring2004/Jordan.html (616 words)

	Messier M84 - NGC4374; Lenticular Galaxy
		M84 is a bright lenticular galaxy in Virgo (although some astronomers believe it to be an elliptical galaxy), and a member of the Virgo cluster of galaxies.
		M84 is also a radio source, listed in the Third Cambridge Catalogue as 3C272.
		Two supernovae have been seen in M84, in 1957 and 1991, and possibly a third in 1980, although there is some doubt about its exact location.
	www.r-clarke.org.uk /messier/m84.htm (98 words)

	m86.html
		This bright giant galaxy is either an elliptical of type E3 or a lenticular galaxy of type S0_1(3); modern classifications apparently tend more to the lenticular classification.
		Several condensations may be found around this galaxy in our image, especially to the lower part, and the DSSM photo (here to the upper edge), they may be globular clusters belonging to this galaxy.
		But this is not totally uncommon in huge clusters of galaxies as the Virgo cluster, because due to its enormous mass, this huge agglomeration of mass has a strong gravitational field.
	pulsar.netfirms.com /m086.html (417 words)

	Messier Object 84
		Messier 84 (M84, NGC 4374) is one of the brighter member galaxies of the Virgo Cluster of Galaxies.
		It is a giant lenticular or elliptical galaxy: Either a lenticular of type S0 seen face-on, or an elliptical galaxy of type E1.
		M84 has been discovered and cataloged by Charles Messier on March 18, 1781 when he also cataloged 7 more nebulous objects in the same celestial region, all of them member galaxies of the Virgo Cluster, as well as globular cluster M92.
	www.seds.org /messier/m/m084.html (531 words)

	Astronomy Online - Messier Objects
		M84 - an elliptical galaxy in the constellation Virgo.
		M85 - a lenticular galaxy in the constellation Coma Berenices.
		M88 - a spiral galaxy in the constellation Coma Berenices.
	astronomyonline.org /Astrophotography/Messier3.asp?Cate=Messier3 (302 words)

	Cosmos: The SAO Encyclopedia: s0 galaxy (Site not responding. Last check: 2007-11-04)
		M84 and M86 may be elliptical galaxies or S0 galaxies.
		They consist primarily of old, population II stars and for this reason, are often misclassified as elliptical galaxies when viewed face-on.
		The origins of S0 galaxies are still unknown, but one idea is that they were originally spiral galaxies which either lost or used up their interstellar material through interactions with another galaxy.
	cosmos.swin.edu.au /entries/s0galaxy/s0galaxy.html (163 words)

	The classification of galaxies
		The main classification is based on the morphology of the galaxy, that is on its appearance.
		By counting the galaxies in a fixed volume of the Universe, one finds that the most numerous galaxies are the irregular ones, followed by the spiral galaxies and finally by the elliptical ones.
		Among spiral galaxies, examples like the following one are observed, where the spiral arms originate from a bar crossing the center of the galaxy.
	www.pd.astro.it /education/PlanetV/planetarium/models/L26_01S.html (549 words)

	eSky: M84
		An elliptical galaxy more than forty million light years from the Earth, part of the Virgo cluster.
		M84 in the Virgo Cluster is an elliptical galaxy of the type known as lenticular.
		M84 lies at the heart of a group of thousands of galaxies that together form the Virgo Cluster.
	www.glyphweb.com /esky/galaxies/m84.html (94 words)

	YourArt.com >> Encyclopedia >> M84 (Site not responding. Last check: 2007-11-04)
		M84 machine gun, Yugoslav copy of the PK machine gun
		Lenticular Galaxy M84, a Messier object and lenticular galaxy in the Virgo constellation
		M84 pattern camouflage, as used by the Royal Danish Army, which is based on the German Flecktarn pattern.
	www.yourart.com /research/encyclopedia.cgi?subject=/M84 (78 words)

	Galaxy classification - Wikipedia, the free encyclopedia
		Astronomers classify galaxies based on their overall shape (elliptical, spiral or barred spiral) and further by the specific properties of the individual galaxy (for example degree of ellipse, number of spirals or definition of bar).
		From this, astronomers have constructed a theory of galaxy evolution which suggests that ellipticals are, in fact, the result of collisions between spiral and/or irregular galaxies, which strip out much of the gas and dust and randomize the orbits of the stars.
		Galaxies and the Universe - an introduction to galaxy classification
	en.wikipedia.org /wiki/Galaxy_classification (1196 words)

	Messier M86 - NGC4406; Lenticular Galaxy
		M86 is a bright lenticular galaxy lying at the heart of the Virgo cluster of galaxies which contains some 1,300 to 2,000 member galaxies.
		It was discovered and catalogued by Charles Messier in 1781 who also catalogued 7 other galaxies in the same region - all members of the Virgo cluster.
		84: [M84] their appearances are the same, and both appear together in the same field of the telescope".
	www.r-clarke.org.uk /messier/m86.htm (130 words)

	M84 HST (Site not responding. Last check: 2007-11-04)
		The Hubble Space Telescope was employed to investigate the central core of the bright and large Virgo Cluster lenticular galaxy M84.
		The long blue frame marks the position where a slit was layed over the very center of the galaxy (the bright dot), for investigation with the Space Telescope Imaging Spectrograph (STIS), one of the instruments newly installed at HST's second servicing mission (STS-82, Space Shuttle Discovery) in February 1997.
		In case of the central object of M84, 300 million solar masses are concentrated within a distance of 26 light years from the galaxy's center.
	www.obspm.fr /messier/more/m084_hst.html (257 words)

	The Universe within 100 million Light Years - The Virgo Supercluster
		M82 is a famous starburst galaxy, the galaxy has had a close encounter with its larger neighbour M81 in the past few million years, and the near-miss has generated a large wave of star formation within the galaxy.
		This is a neighbouring group of galaxies in Centaurus and is dominated by the two spiral galaxies M83 and NGC 4945 and the large lenticular galaxy NGC 5128.
		The Virgo II groups are a long filament of galaxies extending southwards from the groups of galaxies at the southern edge of the Virgo cluster.
	www.atlasoftheuniverse.com /virgo.html (1108 words)

	Galaxies M84 and M86
		M86 and M84 are two giant lenticular galaxies at the heart of the Virgo cluster of Galaxies.
		Located in Markarian's Chain, M84 was studied by the Hubble Space Telescope in 1997 and was found to contain a massive central object, estimated at 300 million solar masses, located less than 26 light years from the center of the galaxy.
		NGC 4438, a spiral galaxy at the left of the photo, appears to be distorted by an interaction with nearby NGC 4435.
	www.astropix.com /HTML/C_SPRING/M84_M86.HTM (191 words)

	PHYSICS 322, OBSERVATIONAL ASTRONOMY
		Messier 101, the pinwheel galaxy, is a galaxy with a spiral shape located roughly 27 million light years away from Earth.
		NGC 4406 (also known as M86) is a massive, bright galaxy which is thought to be either an elliptical of type E3 or a lenticular galaxy of type S0_1(3).
		NGC 4374 (aka M84) was for a long time wrongly thought to be an E1 elliptical galaxy, an assumption helped along by the old, yellowish stars which populate it.
	web.njit.edu /~dgary/322/StudentImages.html (569 words)

	Belt of Venus: Heart of the Virgo Galaxy Cluster
		Drawing a bead--and a crick'd neck--on the heart of the cluster slowly revealed two soft patches that are the bright galaxies, M84 and M86.
		M84 was bright and spherical with a stellar core.
		M84: 9.1; M86: 8.9; NGC 4387: 12.1; NGC 4388: 11.0; NGC 4402: 11.3; NGC 4425: 11.8; NGC 4435: 10.8; NGC 4438: 10.0
	www.perezmedia.net /beltofvenus/archives/000390.html (1443 words)

	APOD: 2002 April 8 - NGC 2787: A Barred Lenticular Galaxy
		Explanation: Lenticular galaxies aren't supposed to be photogenic.
		elliptical galaxies, they are usually short on dust, gas, and pretty spiral arms.
		lenticular galaxies formed, and what happens in their centers.
	antwrp.gsfc.nasa.gov /apod/ap020408.html (136 words)

	Virgo And Cancer -- Recommendations and Resources (Site not responding. Last check: 2007-11-04)
		Because of the presence of a galaxy cluster (consequently called the Virgo cluster) within its borders 5° to 10° west of Vindemiatrix (ε Vir), this constellation is especially rich in galaxies.
		Some examples are M49 (elliptical), M58 (spiral), M59 (elliptical), M60 (elliptical), M61 (spiral), M84 (elliptical), M86 (elliptical), M87 (elliptical and a famous radiosource), and M90 (spiral).
		A noted galaxy that is not part of the cluster is M104, an elliptical galaxy also called the Sombrero Galaxy.
	www.becomingapediatrician.com /health/160/virgo-and-cancer.html (783 words)

	Messier Object 85
		Messier 85 (M85, NGC 4382) is the northernmost member of the Virgo Cluster in Messier's catalog, and thus situated in constellation Coma Berenices.
		M85 is a luminous lenticular (S0) galaxy; in many respects it seems to be a twin of M84.
		As both galaxies are receding at about 700 km/sec, they may form a physical pair.
	www.seds.org /messier/m/m085.html (249 words)

	Galaxies- Types ccd images
		Elliptical galaxies are highly symmetrical and possess no spiral or other structure.
		The are denoted by the letter E and a number from 0 to 7 to indicate shape from
		M84 in Virgo, classified as a Type E1 elliptical
	hometown.aol.com /astropjm/galaxies1.html (178 words)

	M84 - Fact Sheet - Black Hole Encyclopedia
		M84 is a member of the Virgo Cluster, a grouping of hundreds of galaxies that travel through space as a unit, bound together by their mutual gravitational pull.
		M84 has been classified as an elliptical galaxy, which means that it looks like a fuzzy egg or football, with little apparent structure.
		In recent years, however, some astronomers have suggested that it is a "lenticular" galaxy -- one that looks like a disk when seen from above, but a lens when seen from the side.
	blackholes.stardate.org /directory/factsheet.php?id=6 (272 words)

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