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Topic: NGC 6537

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	New General Catalogue
		The NGC was compiled in the 1880s by Dreyer[?] using observations mostly from William Herschel, and then subsequently expanded with two Index Catalogues (ICs).
		NGC 2346 - a planetary nebula in the Monoceros constellation
		NGC 4321 - M100, a spiral galaxy in the Virgo cluster
	www.ebroadcast.com.au /lookup/encyclopedia/ng/NGC.html (204 words)

	New General Catalogue - InfoSearchPoint.com (Site not responding. Last check: 2007-10-25)
		The NGC was compiled in the 1880s by Dreyer using observations mostly from William Herschel, and then subsequently expanded with two Index Catalogues (ICs), adding nearly 5,000 objects.
		NGC 5866 - A lenticular galaxy in the Draco constellation
		NGC 6402 - M14, a globular cluster in the Ophiuchus constellation
	www.infosearchpoint.com /display/New_General_Catalogue (344 words)

	Preprints
		NGC 2146 is a peculiar spiral galaxy which is currently undergoing a major burst of star formation and is immersed in a extended HI structure that has morphological and kinematical resemblence to a strong tidal interaction.
		The fact that Space Telescope WFPC2 images of the planetary nebula NGC 6537 fails to show the central star is used to derive a limit to its magnitude; it is fainter than a magnitude of 22.4 in the visible.
		We have observed the nearly face-on spiral galaxy NGC 5668 with the TAURUS II Fabry-Perot interferometer at the William Herschel Telescope using the Halpha line to study the kinematics of the ionized gas.
	www.astro.rug.nl /SECR/PREPRINTS/display.php?year=2000 (6085 words)

	6 Comparison of planetary nebula abundances (Site not responding. Last check: 2007-10-25)
		NGC 7662 and NGC 6741 are an interesting addition since they have a lower helium abundance than the others, closer to the solar helium abundance.
		Taken together, this qualitatively agrees with theoretical calculations of a third dredge-up event having occurred in NGC 6537, NGC 6302 and He2-111.
		The single exception to this is NGC 6741, in which Mg is depleted by a factor of 14.
	aanda.u-strasbg.fr:2002 /papers/aa/full/2001/47/aa1829/node6.html (819 words)

	Jim's Hubble Fantasy Worlds
		NGC 6537 is a bipolar (two-lobed) nebula whose expanding gases reach speeds in excess of 200 miles per second.
		Image of planetary nebula NGC 7027 shows remarkable new details of the process by which a star like the Sun dies.
		NGC 1068 is located at a distance of approximately 60 million light years, and is the prototype of a class of galaxies known as Seyfert Type 2.
	www.mindspring.com /~deline/bubbleEntry3.htm (445 words)

	Sgr - Sagittarius
		In a 100-mm NGC 6003 is a compact glow, containing stars forming a "V." There are beautiful star fields in this area.
		NGC Description: A magnificent object, very large and bright, trifid, a double star involved.
		NGC 6530, [a] cluster, bright, large, pretty rich, follows [lies east of] M8.
	mypage.bluewindow.ch /horo/ngc/sgr.htm (1297 words)

	[No title]
		NGC 6514 (M20) Very bright, very large, irregularly round, approximately 40 stars involved in a nebula that is criss-crossed by dark lanes at 135X.
		NGC 6537 Pretty bright, very small, not brighter in the middle, round, about twice the size of the Airy disk at 220X.
		NGC 6642 Pretty bright, pretty small globular that is somewhat elongated and very compressed with a bright middle.
	www.saguaroastro.org /content/db/textversions/Sagittarius.TXT (4114 words)

	Red Spider Nebula: Definition and Links by Encyclopedian.com
		...Red Spider Nebula Red Spider Nebula The Red Spider Nebula, or NGC 6537, is a...about average compared to most spiral galaxies in the universe.
		NGC 6537 - the Red Spider Nebula NGC 6543 - the Cat 's Eye Nebula NGC 6720 - M57, the Ring...discovered by Charles Messier in 1764, who catalogued it as M33 on August 25....
		The Red Spider Nebula, or NGC 6537, is a planetary nebula in the Sagittarius constellation.
	www.encyclopedian.com /ng/NGC-6537.html (138 words)

	DOC: Uranometria chart 339
		It rims the west edge of the compact little open cluster NGC 6520, and appears as a distinct inky spot against the surrounding star-shimmer.
		Described in the NGC as considerably faint, pretty large and of irregular form with mottled appearance, the compact globular cluster lies “in a beautiful field sown profusely with stars”, according to Hartung.
		NGC 6603 appears as a rich, albeit faint, glow measuring 5' across and accented with a few feeble points of 14th mag light.
	www.fortunecity.com /roswell/borley/49/u339.htm (4816 words)

	Celestia -- A Stargazer's Log (Site not responding. Last check: 2007-10-25)
		NGC 6652, a deep-sky globular cluster in Sagittarius
		NGC 6656 (M22) at Ra 18 36.4 Dc -23 54 is not only very bright, very rich, very large, and very much condensed, it is also the easiest globular for northern viewers to spot with the naked eye.
		NGC 6715 (M54) is a difficult globular in binoculars and small telescopes, beautiful with increasing aperture, and quite fascinating to astronomers as a remnant of the recently discovered Sagittarius Dwarf Galaxy, an approaching galaxy currently being devoured by our Milky Way.
	www.nightskyalmanac.com (2719 words)

	Space Wallpapers, Space Pics, Space Pictures
		The Cats Eye Nebula (NGC 6543) is the first planetary nebula ever to be discovered and is in the constellation of Draco.
		The galaxys hallmark is a large, bright core, an unusually large central bulge, and a prominent dust lane, or band of dust in the galactic disc.
		NGC 2392 lies about 5000 light years away and is visible with a small telescope in the constellation of Gemini.
	www.coolbuddy.com /wallpapers/wupload/wall_space.asp?cpage=2 (589 words)

	Astron. Astrophys. 332, 721-731 (1998)
		They are NGC 2440, NGC 2818, NGC 2899, NGC 6537, He 2-111, and M 3-2.
		NGC 6537 is known to be a very high excitation object ([SiVI] was detected in NGC 6537 by Ashley and Hyland 1988), with a very hot central star (
		Conditions in the high density core of NGC 6537 are therefore quite extreme, and due to the uncertain combination of photo- and shock-ionization the computed physical and chemical parameters in the c region have to be taken with caution.
	aa.springer.de /papers/8332002/2300721/sc3.htm (540 words)

	5 Summary (Site not responding. Last check: 2007-10-25)
		We have determined the composition and distribution of the dust in the planetary nebula NGC 6302.
		Outside the solar system, the carbonates dolomite and calcite are only seen in NGC 6302 and NGC 6537 (see also Paper I), and the formation mechanism of carbonates in these environments is not yet understood.
		Diopside is so far only found in NGC 6302 (Koike et al.
	www.edpsciences.org /articles/aa/abs/2002/41/aah3717/node5.html (409 words)

	Photos
		All NGCs (exept one) are Planetary Nebulae, found by visual spectroscopy at the 15" refractor of Harvard College Observatory.
		NGC 6879 was also detected with this method by Copeland on Sep. 17, 1884.
		The 2 ICs were discovered on a plate made at Arequipa of the Eta Carinae region.
	www.klima-luft.de /steinicke/ngcic/persons/pickering.htm (226 words)

	5 Shock excitation in NGC 2818
		6 suggests that the dereddened line ratios for NGC 2818 parallel the trend observed for normal PN, although they are in fact outside of the ranges expected for most emission line nebulae.
		(observed at the centre of NGC 2818) are similar to those for "normal" PN, the ratios in the outer parts are significantly greater, and extend into the regime defined by the shock modelling solutions.
		Grewing 1988), and appear to constitute a primary mechanism for shaping nebular shells at relatively late stages of PN evolution.
	www.edpsciences.org /journal/index.cfm?v_url=aas/full/1998/21/ds7447/node5.html (681 words)

	Filter Performance Comparisons for Some Common Nebulae
		NGC 604 (HII region in galaxy M33 in Triangulum).
		NGC 1514 "CRYSTAL-BALL NEBULA" (planetary nebula in Taurus):
		NGC 7009 SATURN NEBULA (planetary nebula in Aquarius).
	www.cloudynights.com /item.php?item_id=387 (6829 words)

	JAGB: Young Planetary Nebulae (Site not responding. Last check: 2007-10-25)
		We report the relative abundance of atomic and molecular hydrogen (HI) from the Young Planetary Nebulae NGC 2440, 2452, 6302, Hb5, NGC 6537, 7026 and 7027 using the VLA (1984 RMxAA, 9, 153)[6].
		We report the observations of HI from NGC 2440 and 6302 in order to determine if the HI was associated or not with the nebulae.
		HI is associated with NGC 6302 but it is not associated with NGC 2440 (1985 RMxAA, 11, 109)[8].
	www.astroscu.unam.mx /~tony/english/Nebplan.html (161 words)

	Precise Positions for the NGC/IC Planetary Nebulae
		Precise (1" or better) positions have been determined or verified for all the planetary nebulae appearing the NGC and IC catalogues.
		Despite publication in 1990 of the "Strasbourg-ESO Catalogue of Planetary Nebulae", many of the objects there are given with either imprecise or simply incorrect coordinates.
		The best published position for the open cluster (also NGC 2818) is in the ESO/Uppsala Survey of the ESO (B) Atlas, first listed by Holmberg et al.
	www.ngcic.org /papers/plnneb.htm (1979 words)

	Astrobiology Magazine
		(Click for larger image.) Hubble Space Telescope image of NGC 6537, also known as the Red Spider Nebula, the other evolved star in which carbonates are found.
		Each of the two dying stars where Kemper says she detected carbonates began like our own Sun, and then evolved into a red giant, which "starts to eject some its material, not like a supernova but a more gradual loss of mass."
		The stars and their surrounding dust shells - known as the Butterfly Nebula or Bug Nebula or NGC 6302, and Red Spider Nebula or NGC 6537 - are falling apart, with gas moving away from each star, cooling down and condensing into dust.
	www.astrobio.net /news/print.php?sid=290 (1683 words)

	NGC 3 Celestial Body Photos Astro Images Picture bodies Foto
		NGC 3132, Eight-burst planetary, APD 98 11 10
		NGC 6537, Red Spider, APD 98 01 06
		NGC 3938 Images antenne astronomical Photos 4039 bubble celeste free Celestial pics NGC 5247 bode Body gallery.
	www.biochem.szote.u-szeged.hu /astrojan/ngc3t.htm (249 words)

	PSIgate - Physical Sciences Information Gateway: Search/Browse Results
		NGC 2392: The Eskimo Nebula Click on image for larger version.
		NGC 6302: The Bug Nebula Click on image for larger version.
		NGC 6537: The Red Spider Click on image for larger version.
	www.psigate.ac.uk /roads/cgi-bin/search_webcatalogue2.pl?limit=2875&term1=telescope (1006 words)

	Patrick Huggins (Site not responding. Last check: 2007-10-25)
		Above: Overview of the planetary nebula NGC 3132.
		To the right are detailed images of the vertical bar structure seen in the overview.
		To the right are images of the core region of NGC 6537.
	www.physics.nyu.edu /~pjh1/fil_05.html (272 words)

	Planetary Nebulae, Stars & Meteors
		Internal winds emanating from the central stars, shown in the central inset, have been measured in excess of 1000 kilometers per second.
		The Lagoon Nebula can be located with binoculars in the constellation of Sagittarius spanning a region over three times the diameter of a full Moon.
		Cataloged as NGC 6992, these glowing filaments of interstellar shocked gas are part of a larger spherical supernova remnant known as the Cygnus Loop or the Veil Nebula -- expanding debris from a star which exploded over 5,000 years ago.
	members.tripod.com /~totherow/index-24.html (1257 words)

	[No title]
		A NASA animation (3.5Mbytes) shows how this might happen if the dying star has a nearby companion object in a nearby orbit.
		NGC 3242, 6826, 7009, and 7662 are planetary nebulae that contain "FLIERs".
		The next four images are various views of the Cat's Eye Nebula, NGC 6543, obtained originally by Harrington and Borkowski in 1994 and reprocessed by Balick, Wilson, and Hajian in 1999.
	www.astro.washington.edu /balick/WFPC2 (2975 words)

	ESA - Space Science - Exploring space - When did liquid water fill the planets? Maybe not as early as was thought...
		This warm and windy planetary nebula harbours one of the hottest stars in the Universe and its powerful stellar winds generate waves 100 billion kilometres high - intimidating for even the bravest space surfers.
		The Red Spider Nebula, NGC 6537, is a striking 'butterfly' or bipolar (two-lobed) planetary nebula.
		Planetary nebulae are the glowing embers of ordinary stars, such as our Sun.
	www.esa.int /esaSC/SEMO0AS1VED_exploring_1.html (217 words)

	Alpha Centauri's Universe: Exploration Of NGC 6537: Red Spider Planetary Nebula
		Alpha Centauri's Universe: Exploration Of NGC 6537: Red Spider Planetary Nebula
		Officially tagged NGC 6537, this two-lobed symmetric planetary nebula houses one of the hottest white dwarfs ever observed, probably as part of binary star system.
		Internal winds emanating from the central stars, visible in the center, have been measured in excess of 1000 kilometers per second.
	www.earthandspace.info /contents/file0442b.htm (183 words)

	nebulae and star clusters
		• Double Cluster (h and Chi Persei; NGC 869 and NGC 884)
		• Little Dumbbell Nebula (M76, NGC 650 and 651)
		• Veil Nebula (NGC 6960, NGC 6979, NGC 6992/5)
	www.daviddarling.info /encyclopedia/N/nebulae_and_star_clusters.html (102 words)

	[No title]
		However, ISO's discovery, for the first time, of carbonates in dying stars breaks the automatic association between these minerals and liquid water.
		Kemper and her colleagues have found large amounts of the carbonates calcite and dolomite in the nebulae NGC 6302 and NGC 6537, dubbed respectively the 'Bug Nebula' and the 'Red Spider Nebula'.
		These are old stars that have spent the last ten thousand years expelling material through dense stellar winds and are about to 'die' as white dwarfs - small, very dense and opaque 'corpses' of stars.
	sci2.esa.int /press/20020117ISOwater/20020117ISOwater.txt (822 words)

	When Did Liquid Water Fill The Planets
		This warm and windy planetary nebula harbours one of the hottest stars in the Universe and its powerful stellar winds generate waves 100 billion kilometres high — intimidating for even the bravest space surfers.
		The stars observed with ISO are the Bug Nebula (NGC 6302) and the Red Spider Nebula (NGC 6537).
		As old stars usually do, they have spent the last ten thousand years expelling material through dense stellar winds.
	www.spacedaily.com /news/early-earth-02b.html (1149 words)

	Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations
		Energy Citations Database (ECD) Document #5728396 - Spectrum and chemical composition of the remarkable planetary nebula NGC 6537
		Availability information may be found in the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or via the "Full-text Availability" link.
		Spectrum and chemical composition of the remarkable planetary nebula NGC 6537
	www.osti.gov /energycitations/product.biblio.jsp?osti_id=5728396 (137 words)

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