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	Saturn Nebula - Wikipedia, the free encyclopedia
		The Saturn Nebula (also known as NGC 7009) is a planetary nebula in the Aquarius constellation.
		The nebula was originally a low-mass star that transformed into a rather bright white dwarf star, magnitude 11.5.
		The distance to the Saturn nebula is not known very well because there are no reference stars in its neighborhood that have been detected and could be used to accurately gauge its distance.
	en.wikipedia.org /wiki/Saturn_Nebula (237 words)

	M1, The Crab Nebula and Saturn (Site not responding. Last check: 2007-11-01)
		In late December 2002 and early January 2003 Saturn was near the Crab Nebula, and on the night of January 4-5 2003 it passed in front of the nebula.
		The diameter of the nebula is 6' x 4' and it has a magnitude of 8.4.
		Through the eyepiece of the 5.1" the nebula is relatively bright, with an irregular shape to it and diffuse near the edge, with a slightly brighter inner portion that resembled a Z shape.
	members.leapmail.net /~ericj/m1_saturn.html (312 words)

	[No title]
		Saturn is now only visible during the evening twilight and in mid-June sets about 2 hours after the Sun.
		Saturn is now no longer visible as it reaches superior conjunction on the 28th.
		The Helix nebula is difficult to see as it has a low surface brightness, the Saturn Nebula although fainter is easier to see due to its much smaller size.
	www.srcf.ucam.org /astronomy/ob_c.html (1287 words)

	Astrophysical Objects Image Archive
		This is the Cone Nebula in the NGC 2264 cluster.
		This is the Helix nebula, a planetary nebula in NGC 7293.
		This is the Horsehead Nebula and NGC 2023.
	www.windows.ucar.edu /tour/link=/the_universe/astro_obj_il.html (952 words)

	Saturn Nebula (NGC 7009)
		A planetary nebula in the constellation Aquarius, discovered by William Herschel in September 1782, and nicknamed by Lord Rosse in the 1840s, because of its vague resemblance to the sixth planet.
		Like the Blinking Nebula, it has a bright central star at the center of a dark cavity bounded by a football-shaped rim of luminous gas.
		The cavity and its rim are trapped inside smoothly-distributed material in the shape of a barrel and comprised of the star's former outer layers.
	www.daviddarling.info /encyclopedia/S/Saturn_Nebula.html (193 words)

	Saturn
		Early observations of Saturn were complicated by the fact that the Earth passes through the plane of Saturn's rings every few years as Saturn moves in its orbit.
		Saturn's rings remained unique in the known solar system until 1977 when very faint rings were discovered around Uranus and shortly thereafter around Jupiter and Neptune).
		In 1990, HST observed an enormous white cloud near Saturn's equator which was not present during the Voyager encounters; in 1994 another, smaller storm was observed (left).
	dept.physics.upenn.edu /nineplanets/saturn.html (1386 words)

	A Galactic Tour
		The Saturn Nebula, NGC 7009, is in the constellation Aquarius.
		The nebula was formed by the nova of the central star - a sudden release of a large portion of the star's mass.
		This planetary nebula is 3900 light years from Earth and about half an arc minute (or half a light year) accross.
	www.travel-net.com /~mickey/mh052.html (78 words)

	PAS General Articles
		NGC 7009, the Saturn Nebula by John Barra disconnected from a dying red giant star.
		This type of nebula gets its name from the fact that many in their early stages look like a planet in a telescope.
		The Saturn nebula is a classic example of a planetary that does look like at planet in the eyepiece.
	www.astronomical.org /astbook/canyou3.htm (442 words)

	USATODAY.com - Rare X-ray shadow of Saturn's moon made (Site not responding. Last check: 2007-11-01)
		Saturn's moon Titan passed in front of the Crab, which shines brightly in X-rays, on Jan. 5, 2003.
		The Crab Nebula is the remnant of a supernova explosion that was observed to the year 1054.
		"Saturn was about 5% closer to the Sun in 2003, so increased solar heating of Titan may account for some of this atmospheric expansion," said Hiroshi Tsunemi of Osaka University in Japan, one of the co-authors on the paper.
	www.usatoday.com /tech/news/2004-04-07-titan-x-ray_x.htm (496 words)

	The Saturn Nebula (Site not responding. Last check: 2007-11-01)
		This planetary nebula is known as the Saturn Nebula.
		This irregular nebula gets its name from the two extended portions that remind you of the rings of Saturn, especially when the rings of Saturn are viewed almost edge-on.
		Planetary nebulae are formed by an expanding shell of gas thrown off explosively by a dying star.
	members.cox.net /sidleach/ngc7009.htm (199 words)

	SPACE.com -- Spacewatch Friday - Armchair Astronomy: See Saturn Pass in Front of Crab Nebula
		The gas cloud that remained from the explosion is popularly known as the Crab Nebula and the cloud is still expanding outward in all directions at roughly 1,100 miles every second (1,800 kilometers per second).
		Currently, Saturn appears to be looping backward or to the west among the background stars.
		Then, on April 9, Saturn will pass the Crab Nebula again, but this time it will only be a near miss, with Saturn slipping about 19 arc minutes (about two-thirds of the apparent width of the Moon) to the north of the nebula.
	www.space.com /spacewatch/saturn_crab_030103.html (889 words)

	Visual Observations - Page 2
		NGC 7009, the Saturn Nebula, was given the designation of H IV-1 as it was the 1st planetary nebula he discovered, while NGC 7662, the Blue Snowball Nebula, was given the designation of H IV-18 as it was the 18th planetary nebula he discovered.
		At 70x the nebula appeared somewhat elongated in shape and the interior appeared slightly darker, while at 88x the 11th magnitude central star was visible at times with the variable seeing.
		At 70x dimmer and brighter portions of the nebula were visible, as was a serrated edge along the bottom and a detached portion of the nebula at the front.
	members.leapmail.net /~ericj/recent_obs2.html (4865 words)

	NCKAS -Nebula
		NGC 3242 is such a planetary nebula, with the stellar remnant white dwarf star visible at the center.
		Nebula are some of the most striking and beautiful of all the objects in the sky and are considered "Deep Sky Objects" or DSO's because they tend be be very dim and diffuse.
		This complex is an emission nebula (clouds of gas, exited and glowing from the radiation of hot O and B stars) and an impressive open cluster.
	www.nckas.org /nebulae (2194 words)

	NGC7009 - Saturn Nebula (Site not responding. Last check: 2007-11-01)
		NGC7009 is a planetary nebula in the constellation Aquarius.
		As with all planetary nebulae, it's the remnant of a red giant star which has ejected its outer gaseous shell leaving behind a hot, dense, white-dwarf star.
		Additional information and images can be found at The Web Nebulae - Saturn Nebula and at the SEDS - Saturn Nebula.
	www.astroimages.org /ccd/ngc7009.html (136 words)

	ESA - Space Science - Stingray Nebula (Henize 1357)
		A planetary nebulae forms after an aging, low-mass star swells to become a 'red giant' and blows off some of its outer layers of material.
		The Stingray Nebula is an 'infant' in relative terms, because only within the past 25 years did its central star rapidly heat up enough to make the nebula glow.
		Named because its shape resembles a stingray fish, the nebula is one-tenth the size of most planetary nebulae and is 18 000 light-years away in the direction of the southern constellation Ara (the Altar).
	www.esa.int /esaSC/SEMSVOW4QWD_index_0.html (333 words)

	DOC: Uranometria chart 347
		Burnham notes that this nebula was one of the first observed by Lord Rosse with his 6-foot reflector, and is described in his 1850 paper "Observations on the Nebulae".
		Burnham calls the Saturn a "strikingly beautiful object in large telescopes." He notes that it shines with a "vivid green fluorescent glow" and calls attention to the conciderable intricate detail in both rings, and notes that the two projecting rays end in bright condensations about 44" apart.
		Houston calls this nebula "one of the brightest planetaries in the heavens, and its oval 8th mag disk is easy to spot with small telescopes.
	www.fortunecity.com /roswell/borley/49/u300.htm (1310 words)

	HubbleSite - Hubble Witnesses the Final Blaze of Glory of Sun-Like Stars - 12/17/1997
		Astronomers have dubbed this object the "Twin Jet Nebula" because of the shape of the lobes.
		If the nebula is sliced across the star, each side appears much like a pair of exhausts from jet engines.
		Indeed, because of the nebula's shape and the measured velocity of the gas, in excess of 200 miles per second, astronomers believe that the description as a super-super-sonic jet exhaust is quite apt.
	oposite.stsci.edu /pubinfo/PR/97/38/b5.html (230 words)

	[No title]
		Planetary nebulae such as the Ring Nebula (M57), the Dumbbell Nebula (M27), and the Saturn Nebula (NGC7009) similarly display dramatically-heightened levels of contrast and observable detail.
		For the observation of diffuse emission and planetary nebulae.
		Objects such as the Omega (Swan) Nebula (M17) in Sagittarius, the Orion Nebula (M42) in Orion, the Helix Nebula (NGC 7293) in Aquarius, and the Eagle Nebula (M16) in Serpens are revealed in dramatically increased detail.
	www.meade.com /catalog/meade_4000/meade_series_4000_nebular_filters.htm (1067 words)

	ScienceDaily: Predicting The Weather On Titan?
		Rivers On Titan, One Of Saturn's Moons, Resemble Those On Earth (December 5, 2005) -- Recent evidence from the Huygens Probe of the Cassini Mission suggests that Titan, the largest moon orbiting Saturn, is a world where rivers of liquid methane sculpt channels in continents of ice.
		Saturn -- Saturn is the sixth planet from the Sun.
		Saturn is currently known to have 47 moons, many of which were discovered very recently, and 3 suspected...
	www.sciencedaily.com /releases/2006/01/060123164538.htm (1860 words)

	NGC 7009 sketch at Mt. Wilson (Site not responding. Last check: 2007-11-01)
		Discovered by William Herschel in 1782, the Saturn Nebula was the first discoveries of William Herschel on September 7, 1782, when he started his great survey.
		This remarkable planetary nebula has its name from its appearance, which resembles a faint suggestion of the planet Saturn with rings nearly edge-on (Lord Rosse named it in the 1840s).
		According to Admiral Smyth, the Saturn Nebula was one of Struve's nine "Rare Celestial Objects."
	www.whiteoaks.com /sketches/saturnnebula.html (175 words)

	ESA - Space Science - Space sensations - Saturn Nebula (NGC 7009) (Site not responding. Last check: 2007-11-01)
		The Saturn Nebula (NGC 7009) was one of the first discoveries of Sir William Herschel on 7 September 1782.
		This remarkable planetary nebula takes its name from its appearance, in early observations it had a faint resemblance to the planet Saturn with rings nearly edge-on.
		The cavity and its rim are trapped inside smoothly-distributed greenish material in the shape of a barrel, which was the star's former outer layers.
	www.esrin.esa.it /export/esaSC/SEMBR33VQUD_sensations_2.html (242 words)

	Nebulae
		The Crab Nebula is a supernova remnant (SNR) created by the explosion of a star in 1054 AD.
		Most of the emission from the nebula is synchrotron radiation from high energy particles spraying off the pulsar at the center of the nebula.
		Even after subtraction of median smoothed backgrounds and a strong enhancement of contrast, the large nebula is only barely visible.
	homepage.mac.com /rarendt/Pics/nebulae.html (859 words)

	Saturn: the Planet...the Nebula (Site not responding. Last check: 2007-11-01)
		First stop was the Planetary Nebula page of the atlas, and a hunt for NGC 7009.
		The green flourescent glow of the nebula captivated the audience, and Martin was a happy camper.
		Saturn glowing pearly and creamy colored in my other scope made a lovely companion.
	www.observers.org /reports/98.09.19.6.html (990 words)

	The Saturn Nebula (Site not responding. Last check: 2007-11-01)
		The Saturn nebula is a bright planetary nebula in Aquarius.
		Burnham's says of NGC 7009, "It was called by Lord Rosse the "Saturn" Nebula from the extending rays of ansae which project from the main disc on either side...
		I noted in my log that the Saturn nebula is about twice the size of NGC 7027 (a fine planetary in Cygnus detailed elsewhere) and much brighter.
	www.skyhound.com /sh/archive/aug1/NGC_7009.html (258 words)

	David's Astronomy - Herschel Objects
		Herschel 1-4 / NGC 7009 Planetary Nebula (Saturn Nebula)
		Herschel 1-4 / NGC 7009 - The Saturn Nebula
		Herschel 743-3 - NGC 6781 - Planetary Nebula
	www.richweb.f9.co.uk /astro/herschel_objects.htm (987 words)

	APOD: December 30, 1997 - NGC 7009: The Saturn Nebula
		APOD: December 30, 1997 - NGC 7009: The Saturn Nebula
		Explanation: The layers of the Saturn Nebula give a complex picture of how this planetary nebula was created.
		The above picture, taken in April 1996 and released last week, allows a better understanding of the mysterious process that transformed a low-mass star into a white dwarf star.
	antwrp.gsfc.nasa.gov /apod/ap971230.html (145 words)

	At the Open House & What to Show the Public
		Saturn with its rings tilted at a 10.33 degree angle away from us and shining at about 0 magnitude is always a great sight.
		Saturn’s angular size is about 20 arc seconds and its northern declination make it a superior object in any astronomical telescope, but at higher powers even its “creamy” complexion shows subtle flaws.
		A planetary nebula called the “Saturn Nebula” by Lord Rosse because of extending arms or ansae which protrude from the nebula when seen under a good, dark sky.
	www.umich.edu /~lowbrows/reflections/1997/mdeprest.3.html (847 words)

	ScienceDaily: Titan Casts Revealing Shadow
		On January 5, 2003, Titan transited the Crab Nebula, the remnant of a supernova explosion that was observed to occur in the year 1054.
		"Saturn was about 5% closer to the Sun in 2003, so increased solar heating of Titan may account for some of this atmospheric expansion," said Hiroshi Tsunemi of Osaka University in Japan, one of the coauthors on the paper.
		It is one of the brightest nebulae visible to the...
	www.sciencedaily.com /releases/2004/04/040406084125.htm (1825 words)

	Utah Skies Report for 09/14/2001
		However, because Saturn is 4000x more distant than the moon, the roles were reversed.
		At magnitude 0.03, Saturn is brighter than any of the stars in that area of the sky.
		Saturn is considerably larger and will soon be brighter than Mars.
	www.utahskies.org /report/20010914/20010914weekly.html (2348 words)

	Catalog Page for PIA01965
		Voyager 2 took this photo of Saturn's outer satellite, Phoebe, on Sept. 4, 1981, from 2.2 million kilometers (1.36 million miles) away.
		That, and information from Earth-based observations, indicates Phoebe is almost certainly a captured asteroid, and did not form in the original Saturn nebula as Saturn's other satellites did.
		Other ground-based observations that indicate that Phoebe is a captured asteroid: It orbits Saturn in the ecliptic plane (the plane in which Earth and most other planets orbit the Sun), rather than in Saturn's equatorial plane as the other Saturn satellites do.
	photojournal.jpl.nasa.gov /catalog/PIA01965 (213 words)

	Belt of Venus
		The nebula distance is estimated at 2,400 light years by Hynes, and 2,900 light years by Sky Catalogue 2000.0.
		The dark nebula was elongated northeast to southwest and sported a sharp boundary along its western edge.
		Study of imagery of the region suggests that the dark nebula envelopes the open cluster, particularly toward the south.
	www.perezmedia.net /beltofvenus (2816 words)

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