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Topic: South ecliptic pole

	Highbeam Encyclopedia - Search Results for ecliptic (Site not responding. Last check: 2007-10-02)
		The inclination of the plane of the moon's orbit is 5°9â² with respect to the plane of the ecliptic (the plane of the earth's orbit around the sun).
		Sagittarius SAGITTARIUS [Sagittarius] [Latthe archer], constellation lying on the ecliptic (the sun's apparent path through the heavens) between Scorpius and Capricornus; it is one of the constellations of the zodiac.
		Gemini GEMINI [Gemini] [Latthe twins], northern constellation lying on the ecliptic (the sun's apparent path through the heavens) between Taurus and Cancer, N of Canis Minor; it is one of the constellations of the zodiac.
	www.encyclopedia.com /SearchResults.aspx?Q=ecliptic (573 words)

	Jodrell Bank Observatory: Astronomical Almanac Help (Site not responding. Last check: 2007-10-02)
		The planes of the ecliptic and celestial equator are inclined at an angle equal to the tilt of the Earth's rotation axis.
		The ecliptic latitude of an object in the sky is its angular distance north or south of the ecliptic.
		The ecliptic longitude of an object in the sky is its angular distance (from 0 the 360 degrees) measured eastwards along the ecliptic from the position of the vernal equinox to the intersection of the object's great circle of longitude.
	www.jb.man.ac.uk /almanac/help.html (7137 words)

	Celestial Sphere
		The latitude of the north pole is 90°, that of the equator 0°.
		The perpendiculars to the ecliptic plane define the ecliptic poles.
		As it moves along the ecliptic against the background stars, which are there even if you cannot see them against the blue sky, the Sun therefore appears also to move north and south of the celestial equator.
	www.astro.uiuc.edu /~kaler/celsph.html (1937 words)

	Pole Shifts - Crystalinks
		A pole shift theory is a hypothesis based on geologic evidence that the physical north and south poles of Earth have not always been at their present-day locations; in other words, the axis of rotation had been "shifted".
		Pole shift theory is almost always discussed in the context of Earth, but other solar system bodies may have experienced axial reorientation during their existences.
		Axial Tilt: the ecliptic is the plane of the Earth's ellipsoidal orbital path around the sun; the rotation axis is currently inclined to the ecliptic by an angle of 23.5 degrees: this is called the obliquity, or tilt, of the axis.
	www.crystalinks.com /poleshifts.html (1695 words)

	Spherical Coordinate System Lab
		The declination of the south pole is -90.
		The ecliptic latitude is measured in degrees perpendicular to the ecliptic.
		The ecliptic latitude between the ecliptic and the south ecliptic pole is negative.
	www.mc.cc.md.us /Departments/planet/planet/Coordinate_Systems_Lab.htm (1626 words)

	Astronomy Hypertext: Astronomical Coordinate Systems
		The position of the celestial poles relative to the north and south points of the horizon depends upon the observer's latitude.
		Its poles are the north and south celestial poles, as defined in the preceding section.
		Thus the declination of the north celestial pole is +90o, and that of the south celestial pole is -90
	physics.gmu.edu /~jevans/astr103/CourseNotes/earthSky_coordinateSystems.html (1047 words)

	List
		Although visible from the mid-northern hemisphere near the horizon due south of Leo when that constellation culminates, Antlia’s stars are so faint that stargazers in antiquity didn’t bother to name them.
		This constellation lies less that 20 degrees from the south celestial pole and is therefore invisible from most northern latitudes.
		South of Puppis is Carina, the Keel, and just to the east are Pyxis, the Compass, and Vela, the Sail.
	www.skpranch.com /list.htm (6556 words)

	eSky: Northern Celestial Pole
		The declination of the Pole Star (its angular distance from the Celestial Equator) is fixed, by definition, at +90°.
		This is very useful for navigation in the northern hemisphere, since the altitude of the Northern Celestial Pole is always equal to the observer's own latitude: by measuring the Pole's angle to the horizon, it's possible to exactly calculate your own distance from the Earth's equator.
		Because the Celestial Poles coincide with the Earth's geographic poles, this line also represents the Earth's north-south axis with respect to the Galaxy as a whole.
	www.glyphweb.com /esky/concepts/northerncelestialpole.html (586 words)

	Ice At The South Pole of The Moon
		Recent data from the Clemetine mission supports the possiblity of the presence of water ice at the south pole of the Moon.
		In permanently shadowed regions on the surface of the Moon, the temperature is a constant -233 degrees centigrade.
		The radar ground tracks, shown in green, are illustrated on the south polar mosaic (the permanently dark regions are shown in red).
	www.lpi.usra.edu /expmoon/clementine/pole.html (399 words)

	ASP: This Restless Globe
		The ecliptic's axis currently extends north to the north ecliptic pole, a point in Draco, and south to a point in Dorado we call the south ecliptic pole.
		The celestial equatorial plane and the ecliptic currently intersect in Pisces, not far from the border with Aquarius, and in Virgo, not far from the border with Leo.
		The Sun in its apparent yearly progress along the ecliptic reaches the Pisces intersection at the Spring equinox on 21 March and the Virgo intersection at the Autumn equinox on 23 September.
	www.astrosociety.org /education/publications/tnl/45/globe1.html (871 words)

	The North Pole (90°N)
		From the north pole, every direction is south, and the sun does not rise and set, except only by virtue of its apparent annual motion along the ecliptic.
		The pole is directly to the north - a mile perhaps.
		Notice that at the north pole, the celestial equator coincides with the horizon.
	domeofthesky.com /npole.html (317 words)

	Poleshifts (3)
		are receding from the poles and approaching the equator, while the arctic and antarctic circles are receding from the equator and approaching the poles.
		This process may be repeated again and again, each complete spiral circuit of the heavens, from the north pole to the south pole of the ecliptic and back, being composed of 90 whorls, and taking about two and a third million years to complete.
		At present the angle of inclination of the earth's axis is about 23.4° (or rather 336.6°); the tropics lie 23.4° north and south of the equator, and the polar circles lie at 66.6° north and south latitude (or 23.4° from the north and south poles).
	ourworld.compuserve.com /homepages/dp5/pole3.htm (7743 words)

	THE NIGHT SKY GLOSSARY
		The south polar cap is at a declination of –90°, the equator is at declination 0°, and the north polar cap is at a declination of +90°.
		Declination is to a celestial globe as latitude is to a terrestrial globe, a vertical positioning of an object.
		The ecliptic's axis currently extends north to the north ecliptic pole, a point in the constellation Draco, and south to a point in the contellation Dorado we call the south ecliptic pole.
	www.souledout.org /nightsky/nsglossary.html (2694 words)

	Sacramento Peak: Glossary
		It ranges between -90 degrees at the southern celestial pole and +90 degrees at the northern celestial pole and is zero at the celestial equator.
		The ecliptic latitude is zero on the ecliptic, +90 degrees at the north ecliptic pole, and -90 degrees at the south ecliptic pole.
		The ecliptic longitude is zero on the meridian that passes through the point where the Sun is during the vernal equinox, and is commonly expressed in degrees to the west of the equinox, between 0 and 360 degrees.
	www.nso.edu /PR/glossary.html (9467 words)

	WorldWideLearn.com North Pole Solo 2004 \| The North Pole
		The Geomagnetic North Pole is the pole of the Earth's geomagnetic field closest to true north.
		Astronomers define the north "geographic" pole of a planet in the solar system by the planetary pole that is in the same ecliptic hemisphere as the Earth's North Pole.
		For the magnetic poles, their names are decided upon by the direction that their field lines emerge or enter the planet's crust.
	www.worldwidelearn.com /northpole/thepole/index.html (568 words)

	The Path of the Sun, the Ecliptic
		Planets seen in the sky are always near the ecliptic, which means that their orbits are never too far from the plane of the ecliptic.
		The moon's orbit cuts the ecliptic at a shallow angle, around 5 degrees, which means that on the celestial sphere the Moon, too, follows a path through the zodiac.
		Since the Sun and Earth are in the plane of the ecliptic, the line is automatically in that plane too; if the moon is also on the same line, it must be in the plane of the ecliptic as well.
	www-spof.gsfc.nasa.gov /stargaze/Secliptc.htm (1232 words)

	ESA Science & Technology: Ulysses returns to the Sun's south pole and encounters blustery solar weather (Site not responding. Last check: 2007-10-02)
		Just as solar storms are brewing, the European-built space probe, Ulysses, is venturing over the Sun's south pole for the second time in its 10-year life.
		Conditions are very different from those Ulysses encountered during its first south polar pass in 1994 when solar activity, which is related to the magnetic behaviour of the Sun, was very low.
		A joint ESA and NASA mission, it is the first spacecraft ever to be launched into an orbit outside the ecliptic, the plane in which the planets orbit the Sun.
	sci.esa.int /content/news/index.cfm?aid=1&cid=1&oid=24561 (516 words)

	Astronomical Coordinate Systems
		Half circles from pole to pole, which are all perpendicular to the equatorialplane, are called meridians.
		The vertical circle passing through the south and north point (as well as zenith and nadir) is called local meridian; the one perpendicular to it through west point, zenith, east point and nadir is called prime vertical.
		The galactic north pole is at RA = 12:51.4, Dec = +27:07 (2000.0), the galactic center at RA = 17:45.6, Dec = -28:56 (2000.0).
	www.seds.org /~spider/spider/ScholarX/coords.html (3777 words)

	RedShift / Features - Sky Chart - Ecliptic Guides
		It is useful to display the ecliptic plane when you are viewing the solar system in the heliocentric mode.
		In the ecliptic system the position of an object in the sky is defined by two coordinates: ecliptic latitude and ecliptic longitude.
		Latitude is measured in degrees to the north and south of the Ecliptic.
	www.redshift.de /us/hb/help605208000.htm (416 words)

	Radar aperture synthesis observations of asteroids (Site not responding. Last check: 2007-10-02)
		Simultaneous resolution of echoes in both angle and Doppler frequency provide new constraints on the mainbelt asteroids' pole directions: Bamberga's spin vector is within 40 deg.
		of the south ecliptic pole, and the twofold ambiguity in Iris' pole direction (P. Magnusson, 1989, in Asteroids II, pp.
		For Bamberga, monostatic and bistatic radar echoes and VLA thermal-emission measurements, also reported here, are consistent with radiometric estimates of Bamberga's size and with the hypothesis that the asteroid is overlain by a regolith having a porosity of ~50%.
	echo.jpl.nasa.gov /publications/radar_aperture_synthesis_abs.html (190 words)

	[No title] (Site not responding. Last check: 2007-10-02)
		For this purpose, the north ecliptic pole is a good choice.
		(The choice between north and south pole is a minor issue; the south ecliptic pole is contaminated by the LMC.) The figure to the left shows the PICD model in blue and my model in fl.
		The differences are: * Reach model is fainter in the near-infrared (60% fainter at 3.5 microns); * the spectral shape of the far-infrared galactic emission is slightly different; and * interstellar spectral lines are not present in the PICD model.
	spider.ipac.caltech.edu /staff/reach/SIRTF/bg_picd_new.txt (471 words)

	Introduction for: WHAT'S YOUR SIGN? THE SCIENCE BEHIND THE ZODIAC (Site not responding. Last check: 2007-10-02)
		Because the Earth's axis of rotation is tilted with respect to the Ecliptic (or orbital plane of the Earth about the Sun) by 23.5 degrees, the Celestial Equator and the Ecliptic do not lie on the same plane, but cross each other at an angle of 23.5 degrees.
		The Earth's rotation on its axis has caused the Earth's shape to diverge from a sphere, and has caused the Earth's equatorial regions to bulge out, in the same way that a skater's skirt spreads outward as she spins rapidly on the ice.
		Because the Earth's equator is tilted with respect to the orbital plane of the Earth around the Sun, the so-called Ecliptic plane, the Earth's equatorial bulge is also tilted with respect of the plane along which the Sun and Moon travel.
	cse.ssl.berkeley.edu /lessons/indiv/beth/beth_intro.html (1644 words)

	Penn AstroLab Lecture Notes: Celestial Navigation
		The horizon is at ZA=90, in particular, the north horizon is at AZ=0, ZA=90, and the south horizon at AZ=180, ZA=90.
		Perpendicular to the ecliptic plane are the North Ecliptic Pole (NEP) and the South Ecliptic Pole (SEP).
		This is a reflection of the fact that the ecliptic is inclined to the celestial equator by 23.5 degrees, which is equivalent to saying that the Earth's rotation axis is misaligned by 23.5 degrees with the "axis" of Earth's orbit around the Sun.
	www.aoc.nrao.edu /~smyers/courses/astrolabs/navigation.html (4108 words)

	Constellation Info
		The Greek astronomer and mathematician Ptolemy, in his Almagest, described 48 constellations, of which 47 are known today by the same name.
		At the end of the 16th century the first European explorers of the South Seas mapped the southern sky, which was largely unknown to the inhabitants of the northern hemisphere.
		New constellations were added by a Dutch navigator, Pieter Dirckz Keyser, who participated in the exploration of the East Indies in 1595.
	affy50.tripod.com /Constels.html (6858 words)

	A Short Trip through Space and Time (Site not responding. Last check: 2007-10-02)
		The constellations near the south celestial pole were not named until the 16th century, when they were first viewed by Europeans during the voyages of Magellan and others into earth's southern hemisphere.
		On the earth, latitude is the arc measured north or south from the equator; on the celestial sphere, declination is the arc measured north (+) or south (-) from the celestial equator.
		Looking south from the Great Pyramid on the vernal equinox today, we must wait another two hours (12:30 a.m.) for the sky to turn an additional 30 degrees and Crux to cross the meridian, at which time it is about 24 degrees lower in the sky, barely poking above the south horizon.
	home.globalcrossing.net /~kjohnson/astronomy.htm (4771 words)

	The South Pole (90°S)
		Both time keeping and directions are difficult at the south pole.
		The pole is directly to the south - a mile perhaps.
		Notice that at the south pole, the celestial equator coincides with the horizon.
	domeofthesky.com /spole.html (314 words)

	Old World Auctions - Featured Items
		This early map of the south pole was originally drawn by Henricus Hondius in 1641.
		Viewed from the south, the city with its tall tenement buildings, citadel and the abbey/monastery of St. Giles is encircled by medieval walls.
		It is vividly rendered with good detail throughout the south and south east reflecting the surveys of the Dutch East India Company, while northern and central Asia is filled mostly with mountains, deserts and forests.
	www.oldworldauctions.com /Featured.asp (10901 words)

	The Orbit of Ulysses
		To reach this out-of-ecliptic trajectory, Ulysses was sent out to the planet Jupiter, whose immense gravity was used to deflect the spacecraft in a slingshot fashion into a highly inclined orbit (80 degrees inclined to the ecliptic).
		The spacecraft reached the Sun's south pole in June 1994.
		Ulysses continued its orbit around the Sun reaching the north pole in June 1995.
	www.windows.ucar.edu /tour/link=/space_missions/ulorbit.html&INPUT_STRING=ecliptic&SEARCH_TYPE=phrase&USER_LEVEL=mid&edu=high (206 words)

	LAMBDA - COBE Quadrilateralized Spherical Cube
		With reference to this coordinate system, face 0 is centered COMMENT around the North ecliptic pole (NEP), faces 1 through 4 are along COMMENT the Ecliptic (each spanning 90 degrees of ecliptic longitude), and COMMENT face 5 is centered around the South ecliptic pole (SEP).
		COMMENT (Face 1 spans ecliptic longitudes from -45 (315) to +45 degrees.) COMMENT The anti-vernal equinox point is at the center of face 3.
		COMMENT COMMENT The North Galactic Pole is on face 3 at J2000 ecliptic COMMENT longitude 179.32095 and latitude 29.811954 degrees, and the COMMENT Galactic center is on face 4 at J2000 ecliptic longitude COMMENT 266.14097 and latitude -5.52967943 degrees.
	lambda.gsfc.nasa.gov /product/cobe/skymap_info_new.cfm (2432 words)

	Poleshifts (4)
		It may be significant that during the last ice age, the ice cap was not centred on the geographic north pole but about 15° southward, at a point below Thule, Greenland, at about the same latitude as the present north magnetic pole.
		Ice cataclysms come on not only from the sudden alteration of the poles but also from lowered temperature due to the alteration of the warm fluid currents in the sea and the hot magnetic currents in the earth, the first being known to science, the latter not.
		At the poles, there would be six months of daylight during the summer and six months of winter darkness, were it not for the fact that atmospheric refraction reduces the period of darkness by about half.
	ourworld.compuserve.com /homepages/dp5/pole4.htm (5724 words)

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