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Topic: Messier 17

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	Multiwavelength Messier 17
		Messier 17 is a diffuse emission nebula in the constellation of Sagittarius, and is known by a variety of other names, including the Omega Nebula.
		Nevertheless, it is possible to see that star formation is concentrated in an asymmetric region in the southwestern portion of Messier 17.
		The modest peak seen near the image center could be due to weak emission from the gas within the Omega Nebula, or it could originate from an un-cataloged background quasar.
	coolcosmos.ipac.caltech.edu /cosmic_classroom/multiwavelength_astronomy/multiwavelength_museum/m17.html (739 words)

	Universe Today - High Mass Stars Form From Discs Too
		Messier 17 or M 17, is one of the most prominent star forming regions in our Galaxy.
		M 17 is extremely young - in astronomical terms - as witnessed by the presence of a cluster of high-mass stars that ionise the surrounding hydrogen gas and create a so-called H II region.
		From these observations, adopting standard values for the abundance ratio between the different isotopic carbon monoxide molecules (12CO and 13CO) and for the conversion factor to derive molecular hydrogen densities from the mesured CO intensities, the astronomers were also able to derive a conservative lower limit for the disc mass of 110 solar masses.
	www.universetoday.com /am/publish/printer_high_mass_stars_form_discs.html (1643 words)

	ESPN.com - Strbak stays in game
		PITTSBURGH -- New York Rangers captain Mark Messier was ejected in the second period of Sunday's game against the Pittsburgh Penguins after being assessed a match penalty for spearing.
		With the Rangers trailing 2-1 and on the power play, Messier speared Penguins defenseman Martin Strbak in front of the Pittsburgh net at 6:13 of the second period.
		Messier, also given an automatic game misconduct, cannot return to the New York lineup until a hearing is held on the penalty, according to league policy.
	sports.espn.go.com /espn/print?id=1764912&type=story (132 words)

	The Messier Catalog : Starshine.com
		Messier was interested in finding comets, and this list catalogs objects that proved not to be comets.
		Due to Messier recording it at a location 4 degrees away, it was considered "missing" for long time until his descriptions were paired up with the object NGC2548.
		Messier discovered M88 in 1781, and described it merely as a "nebula without a star".
	www.starshine.com /frankn/astronomy/messier.asp (4931 words)

	Messier 17
		It is not of equal brightness throughout and has one or more places where the milky nebulosity seems to degenerate into the resolvable [mottled] kind; such a one is that just following the hook towards the north.
		The principle star in the preceding are of a horse-shoe-like portion of the nebula M17.
		Messier perceived only the bright preceding branch of the nebula now in question, without any of the attached convolutions which were first noticed by my Father.
	seds.lpl.arizona.edu /Messier/Mdes/dm017.html (1412 words)

	2005 August Deepsky delights (Site not responding. Last check: 2007-09-21)
		The first of the three Messier globular clusters, visible with the naked eye, is Messier 69, in the belly of the Sagittarus tea cup, 2.5 degrees north-east of Kaus Australis.
		Messier was not the only one to see its resemblance to a comet - when Lacaille discovered it in 1752, he described it as similar to "the small nucleus of a comet".
		Although it is the farthest of all the Messier globular clusters at a distance of nearly 70 000 light years, M 54 shows up as a blazing light with a large compressed core and wide outer hazy halo with no stars resolved.
	www.saao.ac.za /assa/html/2005_august_deepsky_delights.html (1057 words)

	The Dispatch (Site not responding. Last check: 2007-09-21)
		Messier, who was born in 1730 and died in 1817, had a love for finding comets.
		Messier decided to publish his findings so other astronomers wouldn't have to go through what he did when looking for comets.
		He started out with some 45 objects, and they came to be called "The Messier Objects." It was odd that Messier would later become more famous for his Messier Objects than for his comet findings.
	www.gilroydispatch.com /lifestyles/contentview.asp?c=179862 (867 words)

	Category:Messier objects - Wikipedia, the free encyclopedia
		The main article for this category is Messier objects.
		The number should be padded up to 3 digits using zeroes.
		A redirect containing the Messier number should also be added to the category, sorted as above.
	en.wikipedia.org /wiki/Category:Messier_objects (104 words)

	Messier to miss 2 games; Belak suspended 8 (Site not responding. Last check: 2007-09-21)
		Messier, 43, was ejected in the second period of the Rangers' 4-3 loss to the Penguins Sunday, when he went after defenseman Martin Strbak during a New York power play.
		The second-leading scorer in NHL history, Messier has 17 goals, 25 assists and 47 penalty minutes in 75 games during his 25th season.
		Messier refused to comment on the play, but Strbak said he was surprised that Messier hit his abdomen with a stick.
	www.post-gazette.com /pg/04083/290063.stm (381 words)

	Cookbook Camera Image Archive (Site not responding. Last check: 2007-09-21)
		Messier 17, taken through an Orion light pollution filter to increase contrast.
		Messier 27 is Rob's favorite image, and was taken as seven frames of 2 minutes each.
		Messier 17 in Color When Al sent this image, he wrote, "I think I am going to get hooked on this tricolor stuff and it will be all your fault!" This image was taken with Al's 8-inch SCT.
	www.willbell.com /cookbook/images.htm (2453 words)

	Weasner's Meade ETX Site
		Messier 55 is an unusually large and open globular; although its total magnitude is a bright 4.4, its brightness is spread out over a large 10' arc area, making it more difficult than it would appear.
		Messier 11 in Scutum sets the standards for all galactic star clusters, so I wanted you to remember this one first before moving on to the nice open clusters (but none to compare) in Sagittarius.
		Messier 17, also known as the "Swan Nebula" and the "Horseshoe Nebula" is about 7' arc long and some 2' arc across with a visual magnitude of only 8.9.....misleading.
	www.weasner.com /etx/ref_guides/sagittarius.html (5991 words)

	Binocular Messier Club - Appendix C
		Appendix C: Appendix C is for reference purposes, listing all 110 of the Messier objects at the times when they are best observed, and in constellation sequence.
		So, if you are wondering what is the best time of the year to observe a Messier object, refer to Appendix C. Appendix C tells you which season to observe each object, each object's coordinates, their NGC numbers, the constellation they are located in, and their sizes and magnitudes.
		Also, Appendix C lists all of the Messier objects in the exact same order as the Astronomical League's Observe manual "Observe: A Guide to the Messier Objects", in case you are using that as an observing aide.
	www.astroleague.org /al/obsclubs/binomess/binomesc.html (130 words)

	index
		[1] has shown that in the M 17 nebula a high mass star [2] forms via accretion through a circumstellar disc, i.e.
		Caption: PR Photo 15a/04 is a reproduction of a three-colour composite of the sky region of M 17, a H II region excited by a cluster of young, hot stars.
		In the left photo, the orientation and the scale at the distance of M 17 (7,000 light-years) are indicated, and the main regions are identified.
	www.eso.org /outreach/press-rel/pr-2004/pr-12-04.html (2514 words)

	Utah Skies -- Deep Sky Observer's Page (Site not responding. Last check: 2007-09-21)
		The plan is to make this the first place you think of when you need information on a particular deep sky object.
		This section provides charts to help you find all the objects as well as images and descriptions of the objects.
		The reason is that for the most part, these were objects which Messier himself missed.
	www.utahskies.org /deepsky/messier/charts/messierTelradFrameSet.html (357 words)

	USATODAY.com - Messier gets two games for spearing incident (Site not responding. Last check: 2007-09-21)
		TORONTO (AP) — New York Rangers captain Mark Messier was suspended for two games Monday for spearing an opponent.
		Messier, 43, was ejected in the second period of the Rangers' 4-3 loss to the Pittsburgh Penguins on Sunday night, when he went after defenseman Martin Strbak during a New York power play.
		Messier refused to comment on the play Sunday, but Strbak said he was surprised that Messier's hit his abdomen with a stick.
	www.usatoday.com /sports/hockey/nhl/rangers/2004-03-22-messier-suspended_x.htm (275 words)

	National Hockey League - Sabres vs. Rangers (Site not responding. Last check: 2007-09-21)
		Messier has been one of the chief culprits for New York's malaise.
		Messier has 644 goals in his career, ranking sixth all-time.
		Andreychuk shook off a weak check by Messier and beat Richter from the left of the crease with 2:12 left in the second period, increasing Buffalo's lead to 5-2.
	www.usatoday.com /sports/scores101/101037/101037323.htm (1268 words)

	Hollister Free Lance (Site not responding. Last check: 2007-09-21)
		The Swan Nebula, Messier 17, offers a kalaidescope of colors.
		Astronomer Charles Messier devoted much of his life to searching the heavens for comets.
		The Messier Marathon is an athletic event of sorts: Participants race around the sky like maniacs for a whole night, only to end up where they started.
	www.freelancenews.com /lifestyles/contentview.asp?c=179862&siteID=33 (853 words)

	Astronomy CD ROM I - Messier 17 (M17), the Omega Nebula, in the Infrared (Site not responding. Last check: 2007-09-21)
		Astronomy CD ROM I - Messier 17 (M17), the Omega Nebula, in the Infrared
		Messier 17 (M17), the Omega Nebula, in the Infrared
		An atlas Image mosaic of Messier 17 (M17), the Omega Nebula.
	astroa.physics.metu.edu.tr /Astronom/ON/M17A.HTM (104 words)

	Spaceflight Now \| Breaking News \| Observatory peering into a star-making factory
		It is known as Messier 17 (M 17), or the Omega, Swan, Horseshoe, or Lobster Nebula, because of its characteristic shape when photographed in visible light.
		A near-infrared, color-coded composite image of a sky field in the south-western part of the galactic star-forming region Messier 17.
		At the same time, their immediate surroundings, e.g., the stellar population in the star-forming cluster of which they are members, must also be investigated before the full picture will emerge.
	spaceflightnow.com /news/n0009/15starfactory (955 words)

	Shadow of a large disc casts new light on the formation of high mass stars
		Based on a large observational effort with different telescopes and instruments, mostly from the European Southern Observatory (ESO), a team of European astronomers [1] has shown that in the M 17 nebula a high mass star [2] forms via accretion through a circumstellar disc, i.e.
		Dieter Nuernberger, member of the team, sees this as a confirmation: "Our 13CO data obtained with IRAM indicate that the disc/envelope system slowly rotates with its north-western part approaching the observer." Over an extent of 30,800 AU a velocity shift of 1.7 km/s is indeed measured (PR Photo 15c/04).
		The 2.2 microns emission is relatively compact (240 AU x 450 AU) - too small to host a cluster of stars.
	www.eurekalert.org /pub_releases/2004-05/eso-soa051104.php (1816 words)

	Spaceflight Now \| Breaking News \| Observatory peering into a star-making factory
		It is known as Messier 17 (M 17), or the Omega, Swan, Horseshoe, or Lobster Nebula, because of its characteristic shape when photographed in visible light.
		A near-infrared, color-coded composite image of a sky field in the south-western part of the galactic star-forming region Messier 17.
		It is in this context that new infrared observations have been made of the inner regions of Messier 17.
	www.spaceflightnow.com /news/n0009/15starfactory (955 words)

	APOD: 2003 April 17 - M106 in Canes Venatici
		Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
		Pierre Mechain and later added to the catalog of his friend and colleague Charles Messier as M106.
		Modern deep telescopic views reveal it to be an island universe -- a spiral galaxy around 30 thousand light-years across located only about 21 million light-years beyond the stars of the Milky Way.
	antwrp.gsfc.nasa.gov /apod/ap030417.html (206 words)

	Star cloud Messier 24 (Site not responding. Last check: 2007-09-21)
		M24 is special among Messier objects in being not a single well-defined object, but a star cloud along the plane of the Milky Way, one of the most impressive that is easily seen from te latitude of Paris.
		This whole region is one of the richest in the sky, lying almost in the direction of the galactic center.
		Feel free to examine the whole 35mm slide field from which this was taken, including 17 Messier objects.
	www.astr.ua.edu /gifimages/m24.html (181 words)

	AAO Messier Objects
		There are also images remastered from archived original plates taken at the Hale Telescope (the Crab nebula images), as well as one of the first colour piuctures taken with the Palomar Schmidt Telescope (M31, full view).
		Star colours in the Globular cluster M5 Messier 8 AAT 31.
		Messier 31 M31 (NGC 224), Galaxy in Andromeda (Palomar Schmidt Telescope)
	www.aao.gov.au /images/general/messier.html (235 words)

	[No title]
		MCALPINE 0 1 1 +1 0 0 17 E.
		MESSIER 0 1 1 Even 0 0 6 M.
		GROSEK 0 0 0 -2 0 1 17 P.
	www.angelfire.com /dc/lhi/LHI640.html (401 words)

	Messier Object 17
		As for many diffuse nebulae, the overall brightness of this object is difficult to estimate, and is given discordantly in the sources.
		The discovery of M17 by De Chéseaux didn't get widely known, so Charles Messier independently rediscovered it and cataloged it on June 3, 1764.
		The Omega or Swan Nebula M17 can be found quite easily, and similar and simultaneously to its apparent neighbor, M16.
	www.seds.org /messier/m/m017.html (522 words)

	[No title]
		To: ptolemy-hackers at messier eecs berkeley edu Subject: configuration Cc: mdhdez at cma.ulpgc.es Sender: owner-ptolemy-hackersat eecs berkeley edu Precedence: bulk Hello We'll go to install Ptolemy in a PC and we'd like to know what the configuration for our PC to Ptolemy run correctly.
		To: ptolemy-hackers at messier eecs berkeley edu Date: Fri, 07 Feb 1997 11:48:05 SADT X-Mailer: Elm [revision: 111.1] Sender: owner-ptolemy-hackersat eecs berkeley edu Precedence: bulk Hi I again have a problem...
		, ptolemy-hackers at messier eecs berkeley edu Message-Id:
	ptolemy.eecs.berkeley.edu /mailing-lists/ptolemy-hackers.archive/ptolemy-hackers.9702 (13035 words)

	mer en furie dans le sagittaire science actualites
		Zoom sur la nébuleuse Oméga, ''le Cygne'' (ou encore Messier 17), dans le Sagittaire.
		Il agite les rivages de la nébuleuse Oméga ou du Cygne, Messier 17, photographiée à 5 500 années-lumière de la Terre dans la constellation du Sagittaire.
		Découverte par le Suisse Philippe Loys de Chéseaux en 1745-46, la nébuleuse M 17 a ensuite rejoint le catalogue du Français Charles Messier le 3 juin 1764.
	www.cite-sciences.fr /francais/ala_cite/science_actualites/sitesactu/magazine/article.php?langue=fr&id_article=1919&id_mag=1 (276 words)

	My Messier Marathon Adventure
		Every year, around the Vernal Equinox, amateur astronomers have their best shot at seeing all 110 of the objects in the Messier catalog in a single night.
		My telescope and eyes would have to be at their best for these, and the sky would have to be very dark.
		At 3:25 UT (7:25pm March 17, Local Time), I found the Andromeda Galaxy (M31) with binoculars.
	skytour.homestead.com /files/messier.html (1175 words)

	Omega
		The Omega Nebula, Messier object 17 (M17), NGC6618, in the constellation Sagittarius, as seen by the Kitt Peak 4-meter Mayall telescope in 1973.
		The Omega Nebula, Messier object 17 (M17), NGC 6618, in the constellation Sagittarius, as seen by the Kitt Peak 4-meter Mayall telescope in 1973.
		This bright nebula, criss-crossed by clouds and lanes of opaque dust and gas, is also known as the Swan Nebula and the Horseshoe Nebula.
	www.noao.edu /image_gallery/html/im0052.html (178 words)

	Nebulae
		For more information and a better view click on the image...
		The Orion Nebula - Messiers 42 and 43
		The Cone Nebula and Foxfur - NGC 2264
	www.allaboutastro.com /nebulae.html (62 words)

	[No title] (Site not responding. Last check: 2007-09-21)
		User Field 1 (Binocular) contains the binocular category (Easy, Tougher, Challenge) as defined by the Astronomical League Appendix B (11x80 Binoculars) for the Messier Binocular Certificate.
		This should give you a relative indication of the difficulty of the object.
		Sorting this field shoud provide you with a search order for any Messier Merathon.
	www.ilangainc.com /ASTROPLANNER/depository/AL_MessierClub.txt (99 words)

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