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Topic: Astronomical opposition

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	Search Encyclopedia.com (Site not responding. Last check: 2007-10-07)
		opposition opposition, in astronomy, alignment of two celestial bodies on opposite sides of the sky as viewed from earth.
		Opposition of the moon or planets is often determined in reference to the sun.
		In addition to visual and photographic observations of astronomical bodies and phenomena, perhaps the most valuable use of the telescope is in connection with the spectroscopic study of starlight.
	www.encyclopedia.com /searchpool.asp?target=Astronomical+opposition (551 words)

	Astronomical opposition - Wikipedia, the free encyclopedia
		Opposition is a term used in positional astronomy and astrology.
		In particular, two planets are in opposition to each other when their ecliptic longitudes differ by 180°.
		A planet (or asteroid or comet) is simply said to be in opposition, when it is in opposition to the Sun, as seen from the Earth.
	en.wikipedia.org /wiki/Astronomical_opposition (175 words)

	Astronomical conjunction
		As seen from a planet that is superior, if an inferior planet is on the opposite side of the Sun, it is in superior conjunction with the Sun.
		In an inferior conjunction, the superior planet is "in opposition" to the Sun as seen from the inferior planet.
		The terms "inferior conjunction" and "superior conjunction" are used in particular for the planets Mercury and Venus, which are inferior planetss as seen from the Earth.
	pedia.newsfilter.co.uk /wikipedia/a/as/astronomical_conjunction.html (441 words)

	wikien.info: Main_Page (Site not responding. Last check: 2007-10-07)
		An \'\'\'astronomer\'\'\' or \'\'\'astrophysicist\'\'\' is a scientist whose area of research is astronomy or astrophysics.\n \n\nAstronomy is generally thought to have begun in ancient Babylon by the Persian Zoroastrian priests (the \'\'magi\'\').
		An astronomical clock is a clock with special mechanisms and dials to display the relative positions of the sun, moon, zodiacal constellations, and sometimes major planets.
		In astronomical year numbering, the year 1 BC is numbered 0, the year 2 BC is numbered −1, and in general the year n BC is numbered −(n − 1).
	www.hostingciamca.com /browse.php?title=A/AS/AST (10605 words)

	Astronomical opposition -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-07)
		Opposition is a term used in (Click link for more info and facts about positional astronomy) positional astronomy and (A pseudoscience claiming divination by the positions of the planets and sun and moon) astrology.
		It means that, as seen from some place (usually the (The 3rd planet from the sun; the planet on which we live) Earth), one celestial body is opposite to another in the sky.
		Specifically, two (Any of the celestial bodies (other than comets or satellites) that revolve around the sun in the solar system) planets are in opposition to each other when their (Click link for more info and facts about ecliptic longitude) ecliptic longitudes differ by 180°.
	www.absoluteastronomy.com /encyclopedia/A/As/Astronomical_opposition.htm (236 words)

	Chapter 1: PREDICTABLE PERIODIC EVENTS-PART I
		Extreme brightness range at opposition is -2.5 to -2.9 which correlates to the planet's apparent size.
		Oppositions occurring in August (during this epoch) are the most favorable; with Mars' brightness exceeding Jupiter's.
		Extreme brightness range at oppositions is -1.2 to nearly -3.0 which correlates to the planet's apparent size.
	climate.gi.alaska.edu /Curtis/astro1.html (2099 words)

	Encyclopedia: Astronomical-opposition (Site not responding. Last check: 2007-10-07)
		Ecliptic longitude is one of the co-ordinates which can be used to define the location of an astronomical object on the celestial sphere in ecliptic coordinates.
		Comet Hale-Bopp, showing a white dust tail and blue gas tail (February 1997) A comet is a small astronomical object similar to an asteroid but composed largely of ice.
		See also: Astronomical conjunction Conjunction is a term used in positional astronomy and astrology.
	www.nationmaster.com /encyclopedia/Astronomical_opposition (476 words)

	Science Fair Projects - Syzygy
		The word is usually used in context with the Sun, Earth, and the Moon or a planet, where the latter is in conjunction or opposition.
		The term is also applied to each instance of new moon or full moon when Sun and Moon are in conjunction or opposition even though they are not exactly on one line with the Earth.
		In psychology, Carl Gustav Jung used the term syzygy to denote an archetypal pairing of contrasexual opposites, which symbolized the communication of the conscious and unconscious minds.
	www.all-science-fair-projects.com /science_fair_projects_encyclopedia/Syzygy (468 words)

	Argentina: Congress grants Cavallo emergency powers: Wall Street's man in charge
		Opposition to Cavallo's policies led to mass strikes and protests, ultimately forcing his resignation in 1996.
		The attempt to insulate economic policy from legislative disapproval is, in the final analysis, an attempt to prevent popular opposition from interfering with the policies that have already been dictated by the international banks.
		To the extent that this opposition assumes extra-parliamentary forms, the government will be driven to the methods of military repression.
	www.wsws.org /articles/2001/mar2001/arg-m28.shtml (1119 words)

	Twilight
		The end of this period in the evening, or its beginning in the morning, is also the time at which traces of illumination near the sunset or sunrise point of the horizon are very difficult if not impossible to discern (this often being referred to as "first light" before dawn and "nightfall" after dusk).
		Astronomical twilight is defined as the time when the centre of the refracted disk of the sun is more than 12° below the horizon but less than 18°.
		Most casual observers would consider the entire sky already fully dark at the limit of astronomical twilight, and astronomers can easily make observations of point sources such as stars, but faint diffuse objects such as nebulae and galaxies can only be properly observed beyond the limit of astronomical twilight.
	www.kiwipedia.com /en/astronomical-twilight.html (528 words)

	Encyclopedia: Prime Minister (Site not responding. Last check: 2007-10-07)
		The latter in effect allows the government to appeal the opposition of parliament to the electorate.
		However in many jurisdictions a head of state may refuse a parliamentary dissolution, requiring the resignation of the prime minister and his or her government.
		Opposition may refer to a number of topics: astronomical opposition political opposition parliamentary opposition Opposition to a patent, see for instance Opposition procedure before the European Patent Office This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title.
	www.nationmaster.com /encyclopedia/Prime-Minister (7115 words)

	Astronomical Terms
		Astronomers have estimated that the universe could contain 40 to 50 billion galaxies.
		In 2002, a galaxy discovered by a team of astronomers led by Esther Hu of the University of Hawaii was determined to be the most distant object ever observed—13.6 billion light-years away.
		On Feb. 24, 1987, Canadian astronomer Ian Shelter at the Las Campanas Observatory in Chile discovered a supernova—an exploding star—from a photograph taken on Feb. 23 of the Large Magellanic Cloud, a galaxy some 160,000 light-years away from Earth.
	www.infoplease.com /ipa/A0004425.html (1712 words)

	Astronomical opposition (Site not responding. Last check: 2007-10-07)
		Opposition is a term used in positionalastronomy and astrology.
		Specifically, two planets are in opposition to each other when their ecliptic longitudes differ by180°.
		A planet (or asteroid or comet) issimply said to be in opposition, when it is in opposition to the Sun, as seen from the Earth.This is the best time to observe a planet:
	www.therfcc.org /astronomical-opposition-48400.html (149 words)

	Mars Online Research :: Information about Mars (Site not responding. Last check: 2007-10-07)
		The Astronomical symbol for Mars is a circle with an arrow pointing northeast (Unicode : â).
		On the opposite side of the planet the mineral Goethite, which (unlike hematite) forms only in the presence of water, along with other evidence of water, has also been found by the Spirit rover in the "Columbia Hills".
		In 1877, their choice was adopted as the prime meridian by the Italian astronomer Giovanni Schiaparelli when he began work on his notable maps of Mars.
	in-northcarolina.com /search/Mars.html (4089 words)

	Mars Opposition 2003
		It was the closest to the Sun (perihelion) in its orbit on August 30.
		It was this weird motion of Mars, Jupiter and Saturn that was hardest for early astronomers to explain.
		When the Sun is one of the objects the other is directly opposite it in the sky and can be seen all night.
	www.kidscosmos.org /kid-stuff/mars-oppositions.html (1540 words)

	Zoom Astronomy Glossary: O
		Obliquity is the angle between the plane of a planet's orbit and that of the planet's equator.
		An observatory is a place set up with a device (or devices) for observing astronomical or meteorological phenomenon, like stars, planets, nebula, etc. Observatories often have powerful telescopes (visual, radio, or other types).
		OORT, JAN H. Jan Hendrik Oort (1900-1992) was a Dutch astronomer who calculated the distance to the middle of the Milky Way galaxy, mapped our galaxy, proved that the areas around the center of a galaxy revolves, and proposed the existence of the Oort Cloud in the 1950's.
	www.enchantedlearning.com /subjects/astronomy/glossary/indexo.shtml (1355 words)

	Hong Kong Space Musuem - Stars Shine - Astronomical Events
		Planetary opposition happens when the Earth lies between the Sun and the planets in a straight line.
		The perihelic opposition of Mars in 2003 is the closest in the last 60,000 years.
		As the orbits of Mars and Earth are not perfect circle, the date of close approach and that of opposition may differ by several days.
	www.lcsd.gov.hk /CE/Museum/Space/StarShine/AstroEvent/MarsAtOpposition/e_starshine_ae_mao.htm (255 words)

	INSITES OF THE DAY - Sanhedrin, Daf 42
		First, the midpoint of the month is the point at which the sun and the moon are in astronomical opposition (that is, the earth is directly between the sun and the moon).
		The full moon, the moon in opposition, on the other hand, is on the opposite side of the sky from the sun and thus the light of the sun does not impede its appearance.
		Second, opposition can be a subjective point at which the moon is at the opposite side of the earth from the vantage point of the observer on the dark (night) side of the earth.
	www.shemayisrael.com /dafyomi2/sanhedrin/insites/sn-dt-042.htm (4202 words)

	Mars Opposition Overview (Site not responding. Last check: 2007-10-07)
		An astronomical opposition occurs when an outer planet like Mars lies on a straight line drawn from the sun through the Earth to the planet.
		Mars is a difficult planetary target for amateur astronomers due to its relatively small size.
		At this extremely rare close opposition, Mars will grow to an apparent angular size of about 25 arcseconds, which is similar to Jupiter.
	www.denverastrosociety.org /marsoppo/marsfiles/marsoverview.html (218 words)

	Mars Viewer 2003 Opposition
		If an opposition occurs when Mars is near aphelion (farthest from Sun) the distance between Earth and Mars can be 62 million miles.
		However, if an opposition occurs when Mars is near perihelion (nearest the Sun) that distance will shrink down to 35 million miles.
		Technically this could be the closest approach, but it won't look any different than any other favorable opposition (1988, 1971 or 1956) when Mars was big and bright.
	users.bestweb.net /~davidson/mars2003 (638 words)

	Carnegie Science Center (Site not responding. Last check: 2007-10-07)
		Later astronomers, with larger telescopes, discovered a cloudy atmosphere and ten satellites.
		Opposition – When the Earth is between the Sun and a planet.
		The AAAP (Amateur Astronomy Association of Pittsburgh), founded in 1929, continues to promote the interests that are common to amateur astronomers and to advance the science of astronomy through public education and scientific research.
	carnegiesciencecenter.org /exhibits/planet_calendar.asp (1283 words)

	Mars 2003 Oppositon
		Sidewalk Astronomers in Marin and SF View Mars when the fog is gone.
		Sidewalk Astronomers in Marin August 25, 26, 27 (Monday through Wednesday nights) we'll be at the Downtown San Rafael City Plaza (Fourth Street near A - Court Streets) 10:00 p.m.
		Sidewalk Astronomers in SF August 25 and 26 9:30 to 11:30, weather permitting.
	www.whiteoaks.com /jane/Mars (1872 words)

	Astronomical Calendar - 2005 (Site not responding. Last check: 2007-10-07)
		Saturn is opposite the Sun with respect to Earth and rises at sunset.
		Jupiter is opposite the Sun with respect to Earth and rises at sunset.
		Mars is opposite the Sun with respect to Earth and rises at sunset.
	www.spacearchive.info /astrosked.htm (2343 words)

	Hamlet's Transformation (Site not responding. Last check: 2007-10-07)
		I conclude that Shakespeare was quite aware of the astronomical revolutions of his time, and that in coming down on the side of the Copernican Revolution and its Diggesian corollary, Shakespeare defines poetically the new universal order.
		From the standpoint of the development of astronomical cosmology, eyesight rules on the strength of appearances, sometimes giving the impression that appearance is reality, and that seeing is believing.
		According to the OED, the earliest meaning of "opposition" is astronomical, as used by Chaucer c.1386.
	www.shakespearedigges.org /er.html (5953 words)

	HoustonChronicle.com - Watchers poised for peek at Mars
		Amateur astronomers around the world are holding "star parties" and every astronomical observatory -- including Rice University and George Observatory in Brazos Bend State Park -- is training telescopes on the planet.
		At the time, situated on the opposite side of the Sun, it was 248 million miles from Earth.
		Earth passes Mars every 26 months, when the two planets and the sun are perfectly aligned, a phenomenon known as astronomical opposition.
	www.chron.com /cs/CDA/ssistory.mpl/space/2065886 (810 words)

	Read about Astronomical opposition at WorldVillage Encyclopedia. Research Astronomical opposition and learn about ... (Site not responding. Last check: 2007-10-07)
		Research Astronomical opposition and learn about Astronomical opposition here!
		Earth), one celestial body is opposite to another in the sky.
		Specifically, two planets are in opposition to each other when their
	encyclopedia.worldvillage.com /s/b/Astronomical_opposition (177 words)

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