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Topic: M101 group of galaxies

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	The M101 Group
		Column 6: The angular diameter of the galaxy (arcminutes).
		Column 8: The recessional velocity (km/s) of the galaxy relative to the cosmic microwave background.
		This galaxy may be one of the largest galaxies in the entire Virgo supercluster.
	www.atlasoftheuniverse.com /galgrps/m101.html (519 words)

	M101_group - SiteTracer.com
		The Pinwheel Galaxy, the brightest galaxy in the M101 Group.
		M101 Group; This group is centred around the famous M101 galaxy which is one of the nearest giant spiral galaxies - it has a diameter of 200 thousand light years.
		M101 is the brightest of a group of at least 9 galaxies, called the M101 Group.
	www.sitetracer.com /search/M101_group (309 words)

	Groups of Galaxies containing Messier objects
		Groups and Clusters of Galaxies with Messier objects
		M104 is the dominating member of a small group called the M104 group or NGC 4594 group of galaxies.
		M101 forms the M101 group of at least 9 galaxies with several faint companions.
	www.seds.org /messier/g-group.html (565 words)

	Sea and Sky's Astronomy Resources: Messier Objects M101 - M110
		M101 is a bright object with a magnitude of 7.9.
		M104 is characterized by a dark dust lane that spans the length of the galaxy's disk.
		M105 is the brightest member of a group of galaxies in the constellation of Leo known as the M96 group.
	www.seasky.org /astronomy/astronomy_messier_101to110.html (885 words)

	M101
		M101 in Ursa Major is a beautiful, large, face-on spiral galaxy of the type Sc, meaning it has extended spiral arms and a very small central bulge.
		The galaxy is quite near, at a distance of only 18 million lightyears, and is the center of a small group of galaxies with 23 known members, mostly dwarf galaxies.
		The galaxy is visible in a 7x50 finderscope as fuzzy patch of light, but it should be a clear night, of at least 6th magnitude.
	astro.nightsky.at /Photo/Gal/M101_ST7_TMB.html (524 words)

	Omnipelagos.com ~ article "Pinwheel Galaxy" (Site not responding. Last check: 2007-10-12)
		The Pinwheel Galaxy (also known as Messier 101 or NGC 5457) is a face-on spiral galaxy about 27 million light years away in the constellation Ursa Major.
		M101 is a relatively large galaxy compared to the Milky Way.
		It is thought that in the recent past (speaking in galactic terms) M101 underwent a near collision with another galaxy and the associated gravitational tidal forces caused the asymmetry.
	www.omnipelagos.com /entry?n=pinwheel_%47alaxy (728 words)

	Astronomy Supplement - A Universe of Galaxies
		All the galaxies in the Local Group are moving relative to each other, and it is probably that the small ones orbit the two large spirals, which in turn orbit each other with a very long period.
		Galaxies occur in a wide variety of gravitationally bound systems, ranging from binary pairs through small groups containing a few tens of galaxies to rich clusters composed of hundreds to thousands of galaxies.
		In the category of small groups of galaxies probably the most common are the rather loosely packed groups containing fewer than 10 bright galaxies with typical separations of a few million light years (or a few tens of diameters for a large spiral).
	physics.gmu.edu /astr103/CourseNotes/ECText/ch22_txt.htm (7261 words)

	Whirlpool Galaxy at AllExperts
		M51 is the prime member of the so-called M51 group of galaxies, which is a subgroup of the larger M101 group of galaxies.
		Our own galaxy is also part of a group of galaxies similar to the M51 & M101 group, called the local group, with the center of gravity somewhere between the Milky Way and M31.
		All these various groups (including our own) are part of yet one larger structure called the local supercluster, which dominates our intergalactic neighbourhood and is believed to have approximately 2000 members with the center somewhere in the 60 Mly distant Virgo cluster.
	en.allexperts.com /e/w/wh/whirlpool_galaxy.htm (1217 words)

	M101
		The distance of M101 has been determined by the measurement of Cepheid variables with the Hubble Space Telescope in 1994/95 to be about 24 +/- 2 million light years, by the HST H0 Key Project Team (paper III, 1996).
		According to the recent recalibration of the Cepheid distance scale, the "true" distance of M101 should be closer to a 10 percent higher value (27 million light years).
		Three supernovae have been discovered in M101: The first one, SN 1909A, appeared on Jan 26, 1909 and was discovered by Max Wolf; it was of peculiar type and reached mag 12.1 (Glyn Jones reports that the discovery took place in February, and the SN reached only mag 13.5).
	www.dsi-astronomie.de /M101.htm (494 words)

	Sloan Digital Sky Survey
		This group of three galaxies in the constellation Leo (aka the Trio in Leo) is composed of two spiral galaxies (NGC 3190 at the center of the image, NGC 3187 at the left of the image).
		NGC 1055 is an edge-on spiral galaxy in the constellation Cetus.
		Galaxies of this type have the disk shape of a spiral but instead of well-defined arms, their brightest stars are in a fluffier, more stochastic arrangement.
	www.sdss.org /iotw/archive.html (6283 words)

	M101 Pinwheel Galaxy in Ursa Major
		M101 is also known as the Pinwheel Galaxy.
		The galaxy is extremely large and spans a distance of 170,000 light years in diameter.
		M101 is the brightest of a group of 9 galaxies known as the M101 group.
	www.waid-observatory.com /m101-2006-03-25.html (174 words)

	Physics 7 Lecture #15 - Galaxies
		Statistical arguments suggest that the distribution of galaxies among the ellipticities is roughly uniform.
		For some reason Elliptical galaxies formed all their stars a long time ago, using up all their gas, so that new stars are no longer forming, there is virtually no young stellar population nor gas nor dust.
		It seems almost certain, for example, that the giant elliptical galaxies seen at the centers of rich clusters formed as galaxies gradually accumulated at the center of the cluster's strong gravitational field.
	cassfos02.ucsd.edu /physics/ph7/Galaxies.html (1087 words)

	The M101 Group
		It is only in recent years that distance estimates have become good enough to show that these two galaxies are definite members of the M101 group.
		M63 (left) is a bright galaxy, but it may possibly lie behind the M101 group.
		NGC 5474 (centre) is a disturbed spiral galaxy which has probably had a close encounter with M101 in its recent history.
	www.anzwers.org /free/universe/galgrps/m101.html (517 words)

	M101 Group (Site not responding. Last check: 2007-10-12)
		The M101 Group is a loose group of galaxies located in Ursa Major.
		The group is named after the brightest galaxy in the group, the Pinwheel Galaxy (M101).
		The distances to these three groups (as determined from the distances to the individual member galaxies) are similar, which suggests that the M51 Group, the M101 Group, and the NGC 5866 Group are actually part of a single large, loose, elongated group.
	www.1bx.com /en/M101_Group_of_Galaxies.htm (335 words)

	Galaxies and the Universe - Galaxy Groups and Clusters
		Galaxies and the Universe - Galaxy Groups and Clusters
		The Local Group is still a dynamically active environment, if we may judge from tidal stripping of M32, the imminent demise of the newly-found Sagittarius dwarf spheroidal from galactic tides, and the material pulled into the Magellanic Stream for the same reason.
		I'll stress at the outset that the visible galaxies are such a minor part of the whole assemblages, and are probably even outweighed by the hot intracluster gas, that "cluster of galaxies" is downright misleading, but we're stuck with it.
	www.astr.ua.edu /keel/galaxies/clusters.html (1693 words)

	* M101 - (Astronomy): Definition
		This large "grand design-type" face-on spiral galaxy in Ursa Major was discovered by Mechain in 1781.
		M101 (NGC 5457) is a vast galaxy, one of the largest known, with open spirals.
		The center of the Local Group is roughly between the Milky Way and the Andromeda Galaxy, M31.
	en.mimi.hu /astronomy/m101.html (407 words)

	Galaxies
		Here's a tuning fork composed of real galaxy images; click on the image to see a larger version, click on the name and Hubble Class to see more information about the galaxy from the SEDS Messier Database.
		Such galaxies are sometimes referred to as "Magellanic Irregular" galaxies.
		It has become apparent that collisions, both between galaxies themselves and between the fragments that conglomerated together to build galaxies, are important in the formation/evolution of galaxies.
	cassfos02.ucsd.edu /public/tutorial/Galaxies.html (1087 words)

	The Local Group of Galaxies
		The two closest galaxies to the Milky Way are called the Magellanic Clouds, which may be viewed as satellite galaxies to the Milky Way at a distance of a little less than 200,000 light years.
		The other galaxy of the local group that is visible to the naked eye is the spiral M33 in Triangulum at a distance comparable to that of Andromeda.
		All told, there are about 20 small groups of galaxies lying nearer to us than the Virgo rich cluster.
	www.cartage.org.lb /en/themes/sciences/astronomy/TheGalaxies/Groupsgalaxies/LocalGroup/LocalGroup.htm (280 words)

	M101, the Pinwheel Galaxy! (Site not responding. Last check: 2007-10-12)
		This is called "The Pinwheel Galaxy" because, duh, it is shaped like a pinwheel, at least to the human eye.
		M101, one of the Messier Objects, is a Pinwheel Galaxy located in the constellation, Ursa Major.
		Although it is the brightest of a group of at least 9 galaxies, from a low-powered telescope on Earth, only its center is visible to the eye.
	www.msu.edu /~gloverje/m101.htm (260 words)

	M101Plus
		Among them almost all 120 northern galaxies were imaged with a CCD at the 6-m SAO telescope and the 2.5-m Nordic telescope in La Palma (Karachentsev et al., 1994, Georgiev et al., 1997, Makarova et al., 1997, Karachentsev et al., 1997, Makarova and Karachentsev, 1998, Karachentsev and Drozdovsky, 1998, Tikhonov and Karachentsev, 1998).
		The next lines contain the radial velocity with respect to the centroid of the Local Group (Karachentsev and Makarov, 1996), number of measured brightest stars, mean magnitude and colour of three brightest blue stars, the distance modulus and linear distance of the galaxy, and its absolute blue magnitude.
		As the two previous galaxies, NGC 5585 is a probable member of the M 101 group, but it looks rather isolated with respect to the neighbouring galaxies.
	www.astro.spbu.ru /staff/dio/M101Plus/M101Plus.html (2149 words)

	Messier Object 101
		M101 was discovered by Pierre Méchain on March 27, 1781, and added as one of the last entries in Charles Messier's catalog.
		It was one of the first "spiral nebula" identified as such, in 1851 by William Parsons, the third Earl of Rosse.
		According to one of two common views, M102 may have been an erroneous re-observation of M101, which one may doubt though: Alternatively, and perhaps more probably, M102 could be NGC 5866.
	www.seds.org /messier/m/m101.html (561 words)

	NGC 4038 Group (Site not responding. Last check: 2007-10-12)
		the brightest galaxies in the NGC 4038 Group
		The NGC 4038 Group is a group of galaxies in the constellations Corvus and Crater.
		Based on the above references, the exact membership of this group is somewhat uncertain as is the exact number of galaxies within the group.
	www.1bx.com /en/NGC_4038_group_of_galaxies.htm (184 words)

	M101text
		A unique feature of M101 is the large number of extremely luminous HII regions that populate its spiral arms.
		Studies of giant molecular clouds in M101 suggest the key to the formation of giant H II regions may be related to the efficiency of molecular gas clouds to make new stars.
		Observations of M101 show a greater number of HII regions along the denser SW arm supporting the belief that increased disk mass density leads to a higher rate of star formation.
	www.robgendlerastropics.com /M101text.html (388 words)

	Bob Gardner's "The Milky Way and Beyond" Planetarium Show: Other Galaxies (Site not responding. Last check: 2007-10-12)
		Spiral galaxies are classified as either spiral or barred spirals and are further subclassified according to how tightly the spiral arms are wrapped around the nucleus of the galaxy.
		Our local group of galaxies is drawn ("falling" if you like) towards the Virgo Cluster at a few 100 km/sec.
		It is NGC 205, one of the companion galaxies of the Andromeda Galaxy.
	www.etsu.edu /physics/plntrm/mwshow/galaxy.htm (446 words)

	M51_group - SiteTracer.com
		The M51 group of galaxies A smaller galaxy group at a distance of 37 million light years.
		The M102 candidate NGC 5866 is the brightest member of a conspicuous group of galaxies in Draco, the NGC...
		The Whirlpool Galaxy is the brightest galaxy in the M51 Group, a small group of galaxies that also includes M63 (the Sunflower Galaxy), NGC 5023, and NGC 5229 [10] [11] [12] [13]
	www.sitetracer.com /search/M51_group (250 words)

	[No title]
		J., 89, 814-818 (1984) Photoelectric UBVRI sequences in the Sculptor group galaxies: NGC 45, NGC 55, NGC 247, NGC 253, NGC 300, and NGC 7793.
		J., 111, 591-602 (1996) Photoelectric UBV photometry of galaxies in the clusters Pegasus I, Pegasus II, Abell 262, Abell 1367, and Abell 2197-9.
		Ser., 33, 361-389 (1977) Metal-rich globular clusters in the galaxy.
	www.tass-survey.org /tass/catalogs/loneos.ref (11526 words)

	M101 Spiral Galaxy in Ursa Major (NGC5457) Film Astrophotography
		M101 is the brightest of a group of at least 9 galaxies, called the M101 Group, which includes M51, the famous Whirlpool Galaxy.
		The distance to M101 has been determined with the Hubble Space Telescope to be about 24 million light years away and it is about 170,000 light years in diameter.
		Of interest are several extremely luminous star-forming (H II) regions in the outer spiral arms, some sporting their own NGC numbers.
	www.petesastrophotography.com /gallery/M101/M101.html (96 words)

	Canes Venatici cloud - TheBestLinks.com - Local Group, M81 group of galaxies, Parsec, Radius, ... (Site not responding. Last check: 2007-10-12)
		In astronomy, the Canes Venatici cloud is a galaxy cluster cloud that is part of the Virgo supercluster and harbours our own galaxy.
		"G" stands for the de Vaucouleurs number of the group, "Name" is the proper name used by de Vaucouleurs, "Dist" is the revised distance from [2] (1973) in Mpc, "Brightest" lists the identification of the brightest member galaxy of the group, "B(0)" is the standard face-on B magnitude of that brightest member.
		G. de Vaucouleurs Nearby Groups of Galaxies, Chapter 14 in Galaxies and the Universe, Volume 9 of Stars and Stellar Systems University of Chicago Press (Midway Reprint), ISBN 0-226-45970-5 (1975).
	www.thebestlinks.com /Canes_Venatici_cloud.html (249 words)

	M101 group of galaxies . Earth (Site not responding. Last check: 2007-10-12)
		The M101 group of galaxies or simply the M101 group is a physical group and a galaxy cluster that comprises three of the most famous galaxies in the northern sky: Messier 51 M51, Pinwheel Galaxy M101 and Messier 63 M63.
		Pinwheel Galaxy Messier Object 101, the Pinwheel Galaxy NGC 5474 NGC 5585 NGC 5204 NGC 5238 NGC 5477 UGC 8508 UGC 8837 Holmberg IV, DDO 185 UGC 9405
		The interior of Earth reaches temperatures of 5270 Kelvin K. The planet s internal heat was originally generated during its accretion see gravitational binding energy, and since then additional heat has continued to be...
	www.uk.fraquisanto.net /M101_group_of_galaxies (310 words)

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