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Topic: Deep sky objects

	Deep sky objects (Site not responding. Last check: 2007-11-07)
		objects business objects magnetic objects objects education queensland johnny deep helms deep wilson deep krups deep fryer miami beach deep cryogenic deep tempering
		Bangkok Deep-Sky Objects Observing Contains observations and sketches of deep sky objects by star hopping method in highly light polluted area.
		A CCD Tour of the Universe Includes deep sky objects search, images of all Messier and many NGC and IC objects, mosaics of large nebulae and galaxy clusters.
	www.serebella.com /encyclopedia/article-Deep_sky_objects.html (452 words)

	The Apparent Brightness of Deep Sky Objects (Site not responding. Last check: 2007-11-07)
		With a little experience, the beginner deep sky observer soon becomes aware that the visibility of such objects cannot be determined by published magnitude alone.
		Although its published magnitude indicates that this object is bright, it is in fact one of the more difficult deep sky objects, comparable to the Owl Nebula, requiring the best of observing conditions and perhaps a nebula filter to render it visible.
		If the objects being compared do not have the same total available brightness, as is usually the case, the contribution of area to apparent brightness must be adjusted by the difference in total available light.
	www.starastronomy.org /Library/loso4.html (1496 words)

	Deep sky object (Site not responding. Last check: 2007-11-07)
		Deep sky object (DSO) is a term used often in amateur astronomy to denote objects in the night other than solar system objects (such as planets comets and asteroids) single stars and multiple star systems.
		Generally these are not visible with the naked eye the brightest of them can be seen a small telescope or even with a good pair binoculars.
		These are classified by the Messier catalogue of 110 objects and the much comprehensive New General Catalogue which contains nearly 8000 objects.
	www.freeglossary.com /Deep_sky_objects (539 words)

	A Note on the Apparent Brightness of Deep Sky Objects (Site not responding. Last check: 2007-11-07)
		In general, one finds that most objects are listed not in terms of a single dimension but as a product of dimensions, that is, in terms of their length times their width.
		However, this object which is a very beautiful spiral edgewise galaxy is located at declination - 25.6 deg, a very low declination as seen in our 40 deg N latitude.
		Thus this Messier object is very faint and its observed magnitude is confirmed by the fact that it appears very faint even in a 25" telescope.
	www.starastronomy.org /Library/collett.html (996 words)

	The Discovery of the Deep Sky Objects
		While not a deep sky discovery as the others mentioned here, the occurance of a supernova on July 4, 1054, was observed and recorded by Chinese and (very probably) by ancient North American astronomers; this supernova produced the Crab Nebula (M1), one of the most interesting deep sky objects.
		Abbe Nicholas Louis de la Caille (Lacaille, 1713-1762) observed stars and Deep Sky objects in the Southern sky from South Africa during his 1751-52 journey, invented several southern constellations (many of which are still in use), and compiled a catalog of Southern Deep-Sky objects with 42 entries, 32 of which are real.
		This was the last discovery in the deep sky before Charles Messier (1730-1817) started to compile his catalog, and made his first original discovery of M3 in 1764.
	seds.lpl.arizona.edu /messier/xtra/history/deepskyd.html (4104 words)

	Deep sky object (Site not responding. Last check: 2007-11-07)
		A deep sky object: the peculiar spiral ESO 510-13 in Hydra.
		Many of these and other objects from more catalogues such as the UGC are used by amateurs as a of their observing skills and their equipment.
		It is packed with technical and visual data on about 2,000 deep-sky objects, most of them galaxies.
	www.freeglossary.com /Deep-sky_object (539 words)

	Messier's Deep Sky Objects (Site not responding. Last check: 2007-11-07)
		Messier undertook a search for such 'comet-like' objects, and compiled a catalogue, in order that they should not be mistaken, by himself and others, for comets in the future.
		They are all interesting objects in their own right.
		Objects 1 to 38 are detailed so far.
	www.r-clarke.org.uk /messier/messier2.htm (225 words)

	The Skyhound's Guide to Finding Comets
		Most deep sky objects are faint, diffuse and require a telescope to see.
		One of the tricks to successful deep sky observing is to choose targets that are appropriate for your telescope.
		But many deep sky observers will tell you that the hunt is what they enjoy the most.
	www.skyhound.com /sh/dso_guide.html (2685 words)

	Constellation Photos - Constellations - Digital Images of the Sky
		Deep exposed and highly resolved color photographies show stars down to twelfth magnitude in a standard field of about 26 x 39 degrees.
		A variety of deep sky objects is seen in most constellations and presented as magnifications with description.
		The big images are intended to show the deep sky objects in their galactic environment and can be used as "real sky" finder charts for observers.
	www.allthesky.com /constellations/const.html (230 words)

	The Discovery of the Deep Sky Objects
		No more new deep sky objects were discovered until Magellan, in 1519, reported the sighting of the Large and Small Magellanic Clouds.
		This brought the number of reported deep-sky objects to 11, although Al Sufi's work was not generally known at that time, before Galileo introduced the telescope into astronomy in 1609.
		Abbe Nicholas Louis de la Caille (Lacaille, 1713-62) observed stars and Deep Sky objects in the Southern sky from South Africa during his 1751-52 journey, invented several southern constellations (many of which are still in use), and compiled a catalog of Southern Deep-Sky objects with 42 entries, 33 of which are real.
	www.obspm.fr /messier/xtra/history/deepskyd.html (3843 words)

	CyberSky Home Page
		Sky charts can include stars, constellations, deep sky objects, and solar system objects, and can be enhanced by the addition of labels, coordinate system grids, and reference lines.
		CyberSky has the ability to quickly and easily show you what is visible today or next weekend, but it is also accurate enough to help with research involving the appearance of the sky in the distant past, for example, during the era of pyramid construction in ancient Egypt.
		CyberSky provides an excellent way to learn the names and positions of the stars, constellations, and deep sky objects, and to become familiar with the motions of solar system objects across the sky.
	www.cybersky.com (541 words)

	Deep_Sky_Objects (Site not responding. Last check: 2007-11-07)
		Deep sky objects "live" outside of our solar system.
		There are a few different places where deep sky objects are catalogued.
		At the Chico Community Observatory, we tend to show mostly Messier objects, since they are generally larger and brighter than NGC or IC objects.
	www.chicoobservatory.com /deep_sky_objects.htm (267 words)

	Deep Sky Binocular Club Introduction
		The purpose of the Deep Sky Binocular Club is not to put your observing skills to the test by including the toughest objects observable with binoculars, but to allow you to observe and enjoy sixty of the most beautiful objects in the heavens: objects other than those discovered by Charles Messier.
		Even though the sixty objects in the Deep Sky Club are the best objects for small binoculars, it doesn't mean that they are all easy.
		All objects in the Deep Sky Club were observed with 7X50 Orion Explorer binoculars retailing at around $117.00.
	www.astroleague.org /al/obsclubs/dsbinoc/dsbinoc.html (470 words)

	Messier45.com
		The deep sky object Messier 45, number 45 on famous astronomer Charles Messier's list of clusters and nebulous objects, is a beautiful naked eye open cluster of mostly blue stars shrouded in dust reflecting the blue starlight, some of which is visible with binoculars.
		The Deep Sky Browser is an easy to use front-end for the Deep Sky Database which includes accurate and useful information for about 500,000 deep sky objects, over 2 million stars, maps and images for every object and powerful search capabilities.
		The map in the Deep Sky Browser has received a slight face lift, which also seems to have made it slightly faster.
	www.messier45.com (347 words)

	Challenging Summer Deep-Sky Objects
		This is a list of challenging astronomical objects to look for with a telescope of moderate in mid to late summer.
		It's not clear what size telescope the original authors had in mind; probably something in the 10-14" class, but many of these objects should be easily visible to a practiced observer using a 6" or smaller telescope.
		I intend to add links for each object on this list to images and to the appropriate DSS photo, chart numbers for the Harald-Bobroff atlas (that being what I have; if someone else wants to send me Uranometria pages I'll gladly include them as well) and magnitudes, and other information, as as I get time.
	www.shallowsky.com /summer-obs.html (295 words)

	ccdres
		This is a minimum set of sky charts usuful for both visual observing as well as for locating CCD imaging targets.
		On 26 large format maps, it shows the location of thousands of deep sky objects and stars down to about 8th magnitude.
		Only a few images deep sky images are included, however descriptions of thousands deep sky objects are highly informative.
	www.astrosurf.com /jwisn/atlases.htm (400 words)

	Sky Screen Saver for Windows
		The Sky Screen Saver shows the sky above any location on Earth, including stars (from the Yale Bright Star Catalogue of more than 9000 stars to the 7th magnitude), the Moon in its correct phase and position in the sky, and the position of the Sun and all the planets in the sky.
		A database of more than 500 deep-sky objects, including all the Messier objects and bright NGC objects can be plotted to a given magnitude.
		To fulfill its mission as a screen saver, the sky map shifts position on the display every 10 minutes to avoid burning in those few components of the display which do not move as the Earth revolves.
	www.fourmilab.ch /skyscrsv (795 words)

	Deep Sky Database for Palm OS:Deep Sky Objects for Palm OS:SAC Database for Palm OS (Site not responding. Last check: 2007-11-07)
		It consists of around 1100 deep sky objects with a general magnitude cutoff of 12.0 and a surface brightness cutoff of 13.0.
		I have also input distance and extension in light years for every object that had this data in the Sky Atlas 2000 Companion.
		The larger version is the entire SAC database with all fields, all objects and no extra data from the Sky Atlas 2000 Companion.
	www.virtualcolony.com /sac/palm.html (269 words)

	Deep Sky Database:Search for open clusters and globular clusters
		The default magnitude of 99.9 will show all objects (unknown magnitude values are shown as 99.9 in this database).
		Size is in arc minutes - to find an object smaller than 1 arc minute, blank out this field.
		Sort order is by ra (right ascension), mag (magnitude), urano (Uranometria 2000 chart number) or object (object catalog name).
	www.virtualcolony.com /sac/clusters.html (66 words)

	BinoSky: A guide to astronomy with binoculars.
		Observing the sky through binoculars can be very rewarding if you know what's worth looking at, how to find it, and how to interpret what you see when you do find it.
		In the northern-hemisphere sky, I suspect that the main category of object I have missed is stellar associations, since they don't make it into the same catalogs.
		Although I have aimed to cover the whole sky, I have been somewhat more conservative as to what southern objects to include, both because I cannot check them against reality with my own eyes, and because standards are just plain higher down in the More Scenic Half of the sky.
	www.lightandmatter.com /binosky/binosky.html (804 words)

	Astronomical Leage - Template for new pages
		He or she wanted to further the quest for deep-sky objects, but outside of the vast New General Catalog, there was no organized program that would provide that next vital step upward.
		It was soon discovered that a vast majority of Herschel's objects were in Class II and III, faint and very faint nebulae, with magnitudes fainter than thirteen, beyond the reach of many amateur telescopes.
		We of the A.C.A.C. decided that the proposed Herschel Club should consist of enough objects to present a distinct challenge, yet still be within range of amateurs who possessed only modest equipment and were affected by moderate light-pollution problems.
	www.astroleague.org /al/obsclubs/herschel/hers400.html (705 words)

	Hawaiian Astronomical Society - Deepsky Atlas
		The Peoria Astronomical Society provides another Messier survey of the sky, as part of their Astronomical Handbook.
		Finally, there is the Digital Sky Survey, a huge project entering its second generation.
		This is a monochrome CCD record of the entire sky.
	www.hawastsoc.org /deepsky (340 words)

	Open Directory - Science: Astronomy: Amateur: Deep Sky Observing (Site not responding. Last check: 2007-11-07)
		Deep Sky Astronomy - Introduction, techniques, observations, sketches, comet and meteor observations, and links.
		Impressions of the Deep Sky - Gallery of sketches, links, and sketches upload area..
		List of Common Deep Sky Catalogs - General, supernova remnants, planetary nebulae, diffuse nebulae, dark nebulae, open clusters, globular clusters, galaxies, clusters of galaxies, double stars, and references.
	www.dmoz.org /Science/Astronomy/Amateur/Deep_Sky_Observing (519 words)

	Deep Sky Collections and Catalogs
		The American Association of Amateur Astronomers has created a List of Deep Sky Objects (and double and variable stars) for Northern hemisphere observers living in urban regions: The AAAA Urban Astronomy Club List of Objects.
		Boyd Edwards has compiled a big observing list of 884 deep sky objects, which he has collected from the Messier catalog, the Caldwell catalog, the Herschel 400 list of the AL, Burnham (all objects with long description), A. Dyer's 110 "Finest" NGC objects (Observers Handbook 1996), and objects discussed in Sky and Telescope.
		Objects, especially those which are fainter and less suited for amateur observations, are often designated by catalog numbers from professional catalogs; look at a list of some common deep sky catalogs.
	www.obspm.fr /messier/xtra/similar/catalogs.html (1155 words)

	Celestron Sky Maps - 93722 - illustrated stars and deep-sky objects reference guide
		Celestron Sky Map #93722 is the ideal teaching guide for learning the night sky.
		The front cover has a specially designed luminous planisphere that rotates to simulate the seasonal progression of celestial objects through the sky.
		More than a thousand stars and deep-sky objects are listed and charted.
	www.opticsplanet.net /opticsplanet/celestron-sky-map.html (453 words)

	Aurora Astro Products The Multiple Deep Sky Objects List Version I.
		The list is comprised of 347 sets of deep sky objects and over 800 galaxies, nebulas, double stars and clusters.
		Most Objects are visible with a 13.1" telescope or smaller telescope but some very faint and require a larger instrument.
		The objects on the list are varied from open and globular clusters to double stars to planetary.
	www.buytelescopes.com /product.asp?t=&pid=5730&m= (217 words)

	MegaStar Sky Atlas
		Nowadays object databases are easy to come by via the Internet, but a unique feature of MegaStar is that many of the objects have had their positions and orientations manually corrected—tens of thousands of improvements are claimed.
		Deep sky objects are plotted to scale, galaxies are rotated to show their position angle.
		Knowing how large an object is and how it is oriented can make all the difference in the world.
	www.willbell.com /software/megastar/index.htm (1446 words)

	Visual Astronomy of the Night Sky (Site not responding. Last check: 2007-11-07)
		The Deep Sky generally refers to beyond the solar system.
		A Catalog of Deep-Sky Objects, derived from Appendix E from Visual Astronomy of the Deep Sky.
		Roger Clark's pick of 611 deep-sky objects that are the most interesting to observe in amateur telescopes.
	www.clarkvision.com /visastro/index.html (208 words)

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