Trapezium (astronomy)

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	Physics Help and Math Help - Physics Forums - The Orion Trapezium
		I remember have read in an old russian astronomy book that the stars of the "trapezium" are separating radially, as if in the past a giant explosion of a big body have created them, ¿ is this true ?
		In a nutshell, the Trapezium stars appear to be the massive central core of the newly forming 'Orion cluster', and appear to be gravitationally bound.
		09-03-2004 03:34 PM If you google on 'trapezium orion proper motion', you will find lots of interesting papers on the Orion cluster, the Trapezium stars, how they are seen to be moving, what their fates will be, etc.
	www.physicsforums.com /printthread.php?t=40679 (150 words)

	Joint Astronomy Centre - World's most powerful infrared camera opens its eyes on the heavens
		In the brightest region is a cluster of stars known as the "Trapezium", surrounded by clouds of glowing interstellar dust and gas.
		It is operated by the Joint Astronomy Centre in Hilo, Hawaii, on behalf of the UK Particle Physics and Astronomy Research Council (PPARC).
		This is an image at three infrared wavelengths (red represents narrow-band emission from molecular hydrogen gas at 2.12 microns, green represents K-band emission at 2.2 microns, and blue represents J-band emission at 1.25 microns).
	outreach.jach.hawaii.edu /pressroom/2004-wfcam (1577 words)

	Carpal bone
		Trapezium - the most lateral bone of this row.
		Triquetrum - on the ulnar side of the hand, but does not articulate with the ulna.
		Pisiform - a sesamoid bone that lies anterior to (closer to the palm than) the triquetrum.
	www.sciencedaily.com /encyclopedia/carpal_bone (1577 words)

	Astronomy Log: January 2005
		In the Cassigrain Telescope we saw the Andromeda Galaxy m31 next to gamma andromedae (the 3rd star in the line), and the awesome Orion Nebula with gaseous dust that spans across the eyepiece, and Trapezium in the center.
		The Pleiades, 400 light-years away, is within a reflection nebula of gas and dust that scatters blue light.
		Easy to spot as a blob in Taurus, it is the second closest cluster to earth and composed of over 3000 stars, including brown dwarfs: stars without enough mass to produce great amounts of nuclear fusion to produce a shine.
	pvastro19.blogspot.com /2005_01_01_pvastro19_archive.html (1577 words)

	Skeletal System Overview (Morphology) Study Guide by BookRags
		The distal row of carpals that articulates with the metacarpals are the trapezium, trapezoid, capitate, and hamate.
		The proximal row of carpals located from lateral to medial includes the scaphoid, lunate, triquetrum, and pisiform.
		The distal end of the radius articulates with the carpals, the first row of bones in the hand.
	www.bookrags.com /history/health/skeletal-system-overview-morphology-wap.html (1577 words)

	Figure 3 The earliest known eutherian mammal : Nature
		Node 4 (Eutheria): elongation (longer than wide) of trapezium (hatched) (arrow 3; in contrast to the primitive condition of being wider than long).
		Node 3 (Marsupialia): hypertrophy of hamate, enlargement of scaphoid and triquetrum
		Node 2 (crown Theria): longitudinal alignment of mp5 (shaded) to hamate (arrow 2; in contrast to the plesiomorphy of mp5 being offset from hamate; but reversed in some placentals), presence of distal radial malleolus.
	www.nature.com /nature/journal/v416/n6883/fig_tab/416816a_F3.html (1577 words)

	cosmicastronomy.com - world's foremost astronomy encyclopedia
		Trapezium is a giant pullmotor, with negative and positive poles.
		Blue Ngc 1977 and red Trapezium are one large object.
		See what this means - link on left image
	visitastronomy.com (2713 words)

	How Solar Systems Form in Hostile Space :: Astrobiology Magazine :: Search for Life in the Universe
		Blasted by the solar winds of the Trapezium, the proplyds are the next generation of smaller stars to arise in Orion, this time with visible discs that may be forming planets.
		This is critical in our understanding of how solar systems form in hostile regions of space," said Jonathan Williams of the University of Hawaii Institute for Astronomy, lead author on a paper submitted to The Astrophysical Journal.
		Their surrounding ionized cocoons glow due to their close proximity to a nearby hot star formation called the Trapezium.
	www.astrobio.net /news/modules.php?op=modload&name=News&file=article&sid=1607 (571 words)

	Publications Group, SAO 2002 Bibliography
		Henkel, C., Braatz, J. A., Greenhill, L. J., and Wilson, A. "Discovery of Water Vapor Megamaser Emission from Mrk 1419 (NGC 2960): An Analogue of NGC 4258?" Astronomy and Astrophysics 394 (2002): L23-L26.
		Muench, A. A., Lada, E. A., Lada, C. J., and Alves, J. "The Luminosity and Mass Function of the Trapezium Cluster: From B Stars to the Deuterium-Burning Limit." Astrophysical Journal 573 (2002): 366-393.
		Wijnands, R., Heinke, C. O., and Grindlay, J. "A Chandra Observation of the Globular Cluster Terzan 1: The Neutron Star X-Ray Transient X1732-304 in Quiescence." Astrophysical Journal 572 (2002): 1002-1005.
	cfa-www.harvard.edu /cfa/ep/SAOpub02a.html (571 words)

	MERLIN/VLBI Biennial Report 1999-2000: Astronomy
		The prime targets of this observation were the proplyds; YSOs embedded in knots of gas photo-ionised by one of the bright Trapezium stars.
		Another proplyd, LV1, was first resolved as two radio sources in 2cm VLA images and then by the HST as two optical objects separated by 400 milliarcseconds.
		The proplyd LV2 is a superb example of a star recently formed.
	www.merlin.ac.uk /biennial/astro.html (571 words)

	The Bonds: Pioneers of American Astronomy
		Although William Cranch Bond grew up in poverty and left school at an early age to support the family his interest in astronomy and personal traits lead him to be selected as the first Director of the Harvard College Observatory.
		George Phillips Bond described the area around the Trapezium as composed of "wreaths or streaks of nebulosity", and that "in many instances the wreaths, like smoke from wet weeds, grass, or hay thrown on coals, seem to intertwine in a way that is quite difficult to draw".
		George Phillips Bond was at first reluctant to join his father in astronomy as he was very interested in nature and the study of birds.
	members.leapmail.net /~ericj/bond.html (571 words)

	The Bonds: Pioneers of American Astronomy
		George Phillips Bond described the area around the Trapezium as composed of "wreaths or streaks of nebulosity", and that "in many instances the wreaths, like smoke from wet weeds, grass, or hay thrown on coals, seem to intertwine in a way that is quite difficult to draw".
		George Phillips Bond was at first reluctant to join his father in astronomy as he was very interested in nature and the study of birds.
		He felt astrophotography would become an important branch of astronomy, and suggested that it could be used as an aid of, or even a substitute for, the eye.
	members.leapmail.net /~ericj/bond.html (4089 words)

	Hodierna, Giovanni Battista (1597-1660)
		Hodierna discovered the open clusters now known as M6, M36, M37, M38, M41, M47, NGC 2362, NGC 6231, and NGC 6530 (the cluster associated with the Lagoon Nebula) and several comets, and made the earliest surviving drawing of the Orion Nebula, in which three of the Trapezium stars are shown.
		His astronomy seems always to have verged toward astrology, and titles on astrology bulk large in his corpus of work.
		An Italian astronomer at the court of the Duke of Montechiaro whose De Admirandis Coeli Caracteribus (1654) describes some 40 objects found with a simple Galilean refractor of magnification 20.
	daviddarling.info /encyclopedia/H/Hodierna.html (180 words)

	Hodierna, Giovanni Battista (1597-1660)
		Hodierna discovered the open clusters now known as M6, M36, M37, M38, M41, M47, NGC 2362, NGC 6231, and NGC 6530 (the cluster associated with the Lagoon Nebula) and several comets, and made the earliest surviving drawing of the Orion Nebula, in which three of the Trapezium stars are shown.
		His astronomy seems always to have verged toward astrology, and titles on astrology bulk large in his corpus of work.
		An Italian astronomer at the court of the Duke of Montechiaro whose De Admirandis Coeli Caracteribus (1654) describes some 40 objects found with a simple Galilean refractor of magnification 20.
	daviddarling.info /encyclopedia/H/Hodierna.html (176 words)

	Publications Group, SAO 2002 Bibliography
		C., Romer, A. K., and Sadat, R. "XMM-Newton Observation of the Distant (z=0.6) Galaxy Cluster RX J1120.1+4318." Astronomy and Astrophysics 390 (2002): 27-38.
		Muench, A. A., Lada, E. A., Lada, C. J., and Alves, J. "The Luminosity and Mass Function of the Trapezium Cluster: From B Stars to the Deuterium-Burning Limit." Astrophysical Journal 573 (2002): 366-393.
		O Maser Emission in Southern Active Galactic Nuclei and Star-Forming Galaxies: Discovery of a Maser in the Edge-On Galaxy IRAS F01063-8034." Astrophysical Journal 565 (2002): 836-848.
	cfa-www.harvard.edu /cfa/ep/SAOpub02a.html (15722 words)

	Publications Group, SAO 2002 Bibliography
		C., Romer, A. K., and Sadat, R. "XMM-Newton Observation of the Distant (z=0.6) Galaxy Cluster RX J1120.1+4318." Astronomy and Astrophysics 390 (2002): 27-38.
		Muench, A. A., Lada, E. A., Lada, C. J., and Alves, J. "The Luminosity and Mass Function of the Trapezium Cluster: From B Stars to the Deuterium-Burning Limit." Astrophysical Journal 573 (2002): 366-393.
		Alves, J., Lada, C., Lada, E., Lombardi, M., and Bergin, E. "Molecular Cloud Structure: The VLT View." In The Origins of Stars and Planets: The VLT View, Proceedings of the ESO Workshop, eds.
	sao-www.harvard.edu /ep/SAOpub02a.html (15722 words)

	Space Today Online - Spacefaring Japan - Deep Space Astronomy
		The group of four bright stars at the center of the image are known as the Trapezium.
		HCG is a tightly knit clump of galaxies about 300 million lightyears away from Earth in the constellation Hydra.
		NGC 4051 is a spiral galaxy 35 million lightyears away from Earth in the constellation Ursa Major.
	www.spacetoday.org /Japan/Japan/Astronomy.html (2112 words)

	astronomy page
		This is what has happened in the Orion Nebula, and we are fortunate in having a viewpoint from which we can look down into the heart of the nebula to the four stars known as the Trapezium, which have pushed out gas.
		The four striking beams of light stretching far out from the nebula may be either the result of light escaping through holes in the shell surrounding the star, or light from jets of matter being ejected from both poles of the central star.
		The Orion Nebula is in the constellation of Orion, the Hunter, one of the best-known constellations in the sky and one of the few that looks at all like its namesake.
	www.stuart.iit.edu /FACULTY/KRAFT/astronomy.htm (2112 words)

	rogue planet
		Actual examples of rogue planets may have been detected in the region of the Trapezium cluster in the Orion Nebula.
		De La Fuente, M. C., and De La Fuente, M. "Runaway Planets," New Astronomy, 4, 21 (1998).
		If a terrestrial-sized planet was thrown free of its planetary system within a few million years of its formation it might still be swathed in hydrogen.
	daviddarling.info /encyclopedia/R/rogueplanet.html (396 words)

	EXPLORIT Science Center - Astronomy Club Newsletter
		If you are just beginning to develop an interest in astronomy, you may be interested in our continuing "Where's that Star" series.
		For interesting multiple star systems we have the "Trapezium" in Orion, Omicron Draconis, Gamma Andromedae ("Almach"), Iota Cassiopeiae, Eta Persei ("Tien Chuen"), Delta Orionis ("Mintaka"), Alpha Geminorum ("Castor" six stars in one) and Gamma Leonis ("Algieba")
		Old stars such as red Betelgeuse and Aldebaran, contrast with younger stars, the bright blue "babies" of the Pleiades cluster.
	www.dcn.davis.ca.us /go/EXPLORIT/astronews/astroFeb-99.html (396 words)

	Chandra Press Room :: Chandra Finds X-ray Star Bonanza in the Orion Nebula :: January 14, 2000
		Although the enhanced magnetic activity of young stars has been known for some time, the physical causes and evolution of the activity are poorly understood, according to Dr. Eric Feigelson, professor of astronomy and astrophysics at Penn State.
		The most massive and brightest of these nascent stars are in the Orion Trapezium, which illuminates the Orion Nebula, also known as Messier 42.
		The discovery of such a wealth of X-ray stars in the closest massive star-forming region to Earth (only 1,500 light years away) is expected to have a profound impact on our understanding of star formation and evolution.
	chandra.harvard.edu /press/00_releases/press_011400ori.html (396 words)

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