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Topic: Open Cluster M25

	[No title]
		Ser., 34, 241-248 (1978) Multicolor photometry of the open cluster NGC 2287.
		Ser., 33, 361-389 (1977) Metal-rich globular clusters in the galaxy.
		Soc., 125, 307-312 (1963) The galactic cluster NGC 3228.
	www.tass-survey.org /tass/catalogs/loneos.ref (11526 words)

	Open Cluster M25 - Wikipedia, the free encyclopedia
		Open Cluster M25 (also known as Messier Object 25 or IC 4725) is an open cluster in the constellation Sagittarius.
		M25 is at a distance of about 2,000 light-years away from Earth.
		The spatial dimension of this cluster is about 19 light years across.
	en.wikipedia.org /wiki/Open_Cluster_M25 (111 words)

	Open Star Clusters
		Open clusters are physically related groups of stars held together by mutual gravitational attraction.
		The first open clusters have been known since prehistoric times: The Pleiades (M45), the Hyades and the Beehive or Praesepe (M44) are the most prominent examples, but Ptolemy had also mentioned M7 and the Coma Star Cluster (Mel 111) as early as 138 AD.
		All the diffuse nebulae in Messier's catalog are associated with open clusters of young stars which have formed of the nebula's material in (astronomically) very recent times, and are still formed today in many cases.
	www.seds.org /messier/open.html (1098 words)

	Messier Visible Database
		M11 is described as an "exceptional" open cluster bordering the northern edge of the star clouds in Scutum.
		The cluster is visible by the naked eye as a "fuzzy star", but requires a 4 inch scope to resolve individual stars.
		M26 is a small and condensed open cluster of about 100 total members, 25 of which are easily visible in a small telescope.
	affy50.tripod.com /Messier.html (4806 words)

	M 25 (Site not responding. Last check: 2007-11-05)
		It was discovered by J.B. Irwin in 1956, its membership was confirmed by radial velocity measurements conducted by M.W. Feast of Radcliffs Observatory (the common RV of the cluster members is +4 km/sec).
		The occurrence of the Cepheid is consistent with the fact that it is not a very young cluster, its age may be about 90 million years (the Sky Catalog 2000 gives 89 million).
		Messier observed M25 on June 20th, 1746 "Cluster of faint stars near the two preceding ones (M23 and M24), between the head and the tip of the bow of Sagittarius." Charles Messier
	www.messiermarathon.com /new_page_31.htm (288 words)

	Sagittarius (Site not responding. Last check: 2007-11-05)
		Sagittarius, "The Archer," is one of the richest constellations in the sky, filled with numerous nebulae and clusters.
		Below and to the left of M24 is the open cluster M25.
		In the right portion of the image are the large open cluster M7 and the smaller open cluster M6 in Scorpius.
	webpages.charter.net /alsonwongweb/sagittar.htm (257 words)

	M25 - Wikipedia, the free encyclopedia
		M25 motorway, a motorway that circumnavigates London, capital city of England and the United Kingdom.
		Open Cluster M25, a Messier object, an open cluster in the Sagittarius constellation.
		This is a disambiguation page, a list of pages that otherwise might share the same title.
	en.wikipedia.org /wiki/M25 (95 words)

	Messier Object 25
		Eventually, M25 was added to the second Index Catalog by J.L.E. Dreyer in 1908, based on photographic observations and using a position obtained by Solon Irving Bailey (1854-1931), published in Bailey (1908).
		The occurance of the Delta Cephei star is consistent with the fact that it is not a very young cluster, its age may be about 90 million years (the Sky Catalog 2000 gives 89 million).
		Also, as the distance of M25 is quite wellknown by other means, U Cephei can by used as one gauging point of the famous, so-called Cepheid distance scale, which is used for distance determinations of nearby galaxies.
	www.seds.org /messier/m/m025.html (420 words)

	[No title] (Site not responding. Last check: 2007-11-05)
		From star 22 hop to star mag5 which close to M8,M20 & M21; then hop to stars 13 & 21.
		Stars 13-->21-->points to M25 (not in quite straight line).
		M25 appeared as large, loose cluster with faint nebulosity that should be non-resolvable stars.
	www.geocities.com /kival02/M25.html (88 words)

	Messier Object 25
		Open Cluster M25 (IC 4725), type 'd', in Sagittarius
		It was finally rediscovered by Julius Schmidt (1825-84) in 1866 and added to the second Index Catalog in 1908, using a position obtained by Solon Irving Bailey (1854-1931).
		The occurance of the Cepheid is consistent with the fact that it is not a very young cluster, its age may be about 90 million years (the Sky Catalog 2000 gives 89 million).
	www.obspm.fr /messier/m/m025.html (245 words)

	More M25 (Site not responding. Last check: 2007-11-05)
		Open cluster M25 as photographed by Jan Wisniewski.
		This cluster contains one of the nearest Cepheid variables: U Sgr; this is a classical cepheid of period 6.75 days.
		This M25 image was taken on June 14, 1999 from Sooke, BC using Cookbook 245 LDC CCD camera on Ultima 8 f3.0 telescope, autoguided with Cookbook 211 LDC CCD camera on piggybacked 500mm f8 telephoto lens.
	astronomy.nju.edu.cn /astron/messier/m025_m2.html (89 words)

	Stargazer Online \|\| Messier Marathon (Site not responding. Last check: 2007-11-05)
		M53 is a globular cluster is about 1° west of Diadem (Alpha Coma Berenices) and M64 is 1° northeast of 35 Coma Berenicis.
		Between the constellations of Scorpius and Sagittarius are the bright open clusters M6 and M7.
		M2 is the globular cluster than started Messier on his quest of creating a catalog of comet-like objects and can be found 9° to the south-southeast of Enif.
	my.voyager.net /~stargazer/marathon.html (3264 words)

	NexStar 50 Club Observation Log - Kevin Brett
		Found interest with the arc formation in the cluster near bottom right in my eyepiece, flanked on either side by stars that were the brightest of the "arc" and about the same magnitude.
		This is a beautiful open star cluster with colors of yellow, blue and white showing in the stars of this object.
		M71 appeared as a fuzzy dim ball near a bright open cluster with the 5 and 114.
	www.nexstarsite.com /NS50ClubLogs/BrettKevin.htm (4684 words)

	Constellation Report
		This is not a cluster as we typically see.
		This is one of 3 Messier and 1 NGC globulars which are strung across the southern portion of Sagittarius.
		This one might give you a hard time finding it as it is far away from the bright stars of the constellation in a relatively dark portion of the sky.
	www.utahskies.org /deepsky/constellations/sagittarius.html (885 words)

	SPACE.com -- The Sky Tonight -- Friday, September 10
		The dark band dividing the nebula the "lagoon" is a band of dark dust.
		Still moving north, we come across the bright open cluster, M25.
		Astrosociology is the study of astrosocial phenomena (social/cultural patterns related to space), a multidisciplinary field open to all scientists and engineers interested in "space and society" issues.
	www.space.com /scienceastronomy/astronomy/skywatch_910.html (428 words)

	Christi and Darrell - Astronomy (Site not responding. Last check: 2007-11-05)
		M25 is a conspicuous cluster, even in the smallest telescopes.
		M44 is an open star cluster that is easily visible with the naked eye.
		Larger telescopes have confirmed that the cluster has around 200 stars as members.
	www.christianddarrell.com /modules/xoopsfaq/index.php?cat_id=2 (194 words)

	Universe Today - What's Up This Week - Mar 7 - 13, 2005
		Monday, March 7- As we open our week long tour of the "Messier Marathon", the late rise of the Moon tonight will be on the side of North American observers.
		Let's head Northwest as we take on two open clusters visible to both telescopes and binoculars.
		is a bright, compact globular cluster in Hydra that will appear as a "fuzzy star" to binoculars and a treat to the telescope.
	www.universetoday.com /am/publish/whatsup_mar7_2005.html?732005 (4246 words)

	JTB Observational Astronomy Reports (Site not responding. Last check: 2007-11-05)
		On the centerline of the cluster and to the west was a faint double star.
		The rest of the cluster is a hazy mantle and flares to almost all directions on eye move.
		This is the jewel in the midst of the cluster's lotus.
	astro.geekjoy.com /yearreps/aug-01-reports.html (21824 words)

	JTB Observational Astronomy Reports (Site not responding. Last check: 2007-11-05)
		The visible part of this cluster (the core region) exceeds the documented size of many better positioned clusters that observers normally drop their jaws over.
		Switching over to the main tube I was delighted to see either an extremely compact open or a loose globular cluster consisting of hundreds and hundreds of stars easily resolved across the core at 50X.
		As difficult as this cluster was, it was less of a challenge than the Intergalactic Wanderer (NGC2419).
	astro.geekjoy.com /yearreps/jun-01-reports.html (20843 words)

	June 5 night at the Peak
		M7 Open Cluster in Scorpius -- Pretty, ver spread out 8 Beta Sorpii, "Graffias" -- triple star system, easily separated Beta1 and Beta2, showed a lot of Scouts what a multiple star is
		M25 Open Cluster in Sagittarius -- Bright, fairly large open cluster
		M26 Open Cluster in Sagittarius -- Hopped here from M11, not as pretty or large as M11
	observers.org /reports/99.06.05.5.html (819 words)

	Paul's Astronomy Page (Site not responding. Last check: 2007-11-05)
		In my free time I volunteer to help the Monday night tours at the US Naval Observatory, where I intern during the summer and winter break.
		I also am a volunteer docent at University of Maryland's observatory for open houses and other events.
		M67 - Open star cluster, somewhat dim for visual telescopic obs.
	www.bivalves.net /~paulries/astro?N=D (214 words)

	The Utah Skies Report \| Planetary Report \| Constellation Report \| Astronomical Events
		As is typical for this time of year, days have been hot and sunny and nights have been warm and clear.
		Clear skies and seasonally warm temperatures are expected for tomorrow nights season opening star party.
		Saturn's rings are now tilted wide open to us...
	www.utahskies.org /report/20030704/20030704weekly.shtml (3282 words)

	Messier Index
		M11 The Wild Duck Cluster open cluster in Scutum
		M16 open cluster associated with the Eagle Nebula or Star Queen Nebula IC 4703 in Serpens Cauda
		M44 Praesepe, the Beehive Cluster open cluster in Cancer
	www.delphes.net /messier/data2.html (296 words)

	CAAS - Central Arkansas Astronomical Society (Site not responding. Last check: 2007-11-05)
		Photographs, CCD images, and sketches will be accepted.
		M6, The Butterfly Cluster open cluster in Scorpius
		M13, Great Hercules Globular Cluster globular cluster in Hercules
	www.caasastro.org /gallery/MessierGallery (171 words)

	SFA Digital Sky Survey Viewer
		You may need to wait for the new image to load.
		M7 - Open Cluster - The Scorpion's Tail
		M16 - Open Cluster - Associated with the Eagle Nebula
	observe.phy.sfasu.edu /galaxyquest/DSSViewer.html (150 words)

	Northern Sagittarius, 135 mm (Site not responding. Last check: 2007-11-05)
		Just to the left is a fainter nebula known as NGC 6559 Above these two objects you can see a smaller red area next to an even smaller blue area.
		(Click here to see a blowup with more detail of these areas.) To the lower left you can see the open cluster M25.
		Above that is M17, the Omega or Swan Nebula, and above that M16, the Eagle Nebula.
	home.houston.rr.com /dtlocke/astrophoto/N-sagittarius.htm (167 words)

	Amador Astronomical Society - AAS Star Party, August 26, 2005 (Site not responding. Last check: 2007-11-05)
		The Amador Astronomical Society held a 'First Light' star party for its members and guests at their new observing ground at Telescope Flat on Friday, August 26th from 7 PM to Midnight.
		360 degree dark sky viewing enabled participants to see a long list of great objects (see below) starting with Venus and Jupiter just after sun down, Uranus, Neptune, Messier objects, clusters, double stars, and a viewing of Mars just before moon rise at 11:45.
		AAS Astronomers Bob Works, Herb Lee, Dennis Mashburn, Phil, Barbara and Joran Kreiss and AAS president Larry Brown supplied telescopes for the event.
	www.goldrush.com /~kreissb/aas/photos8-05.html (438 words)

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