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Topic: Retrogade orbit

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	[No title] (Site not responding. Last check: 2007-10-25)
		The average period of Comet Halley's orbit is about 76 years.
		The gravitational pull of the mayjor planets alters the orbit period of revolution to revolution.
		Comet Halley's orbit is retrogade inclined 18 degrees to the eclipic.
	laurier.vsb.bc.ca /StudentP/StephJud/halley.html (197 words)

	Chapter 13: Jupiter
		For this reason retrogrades are easier to find since most have very distant orbits and thus spend more of their time out of the glare of Jupiter while the progrades which are closer in have lots of Jupiter scattered light from Jupiter to deal with.
		Orbits of the new satellites were fitted by both Robert Jacobson at the NASA Jet Propulsion Laboratory and Brian Marsden at the Minor Planet Center.
		All are retrograde (they orbit in the direction opposite to the rotation of the planet), and possess similar semi-major axes (about 300 Jupiter radii or 20 million km) The estimated diameters are between about 2 and 4 kilometers, assuming a 4% albedo.
	www.williams.edu /Astronomy/jay/chapter13_etu6.html (4890 words)

	Hypothetical Planets
		Bargby found elliptical orbits for all the objects: eccentricity of 0.498, and semimajor axis of 14,065 kilometers (8,740 miles), which yields perigee and apogee heights of 680 and 14700 kilometers (432 and 9,135 miles), respectively.
		Their orbits are very close to each other, and the most interesting aspect of this satellite pair is that they regularly switch orbits with each other.
		being in a retrogade orbit), and a magnitude of 13-14.
	www.solarviews.com /germ/hypothet.htm (8723 words)

	Lilith
		Petit found that the orbit was elliptical, with a period of 2 hours 44 minutes 59 seconds, an apogee at 3570 km above the Earth's surface and perigee at just 11.4 km (!) above the Earth's surface.
		Pickering devoted his attention to the theory of the subject: if the satellite orbited 320 km above the surface and if its diameter was 0.3 meters, with the same reflecting power as the Moon, it should be visible in a 3-inch telescope.
		Bargby found elliptical orbits for all the objects: eccentricity 0.498, semimajor axis 14065 km, which yields perigee and apogee heights of 680 and 14700 km.
	www.math.ucdavis.edu /~cheung/lilith.html (2216 words)

	Hypothetical Planets
		According to Pickering, it orbited Saturn between the orbits of Titan and Hyperion in a highly inclined orbit: mean distance from Saturn 1,460,000 km, orbital period 20.85 days, eccentricity 0.23, inclination 39 degrees.
		In 1931, after the discovery of Pluto, he issued another elliptical orbit for P: distance 75.5 a.u., period 656 years, mass 50 Earth masses, eccentricity 0.265, inclination 37 degrees, close to the values given for the 1911 orbit.
		Anderson concluded that the tenth planet must have a highly elliptical orbit, carrying it far away to be undetectable now but periodically bringing it close enough to leave its disturbing signature on the paths of the outer planets.
	www.wanderer.org /nineplanets/hypo.html (8289 words)

	Astrology's Forgotten Moons
		The Moon is the only body in the Solar System which in any sense orbits the Earth, although its true motion is of a path weaving in and out of Earth's orbit, lagging behind and racing ahead each month, as its gravitational control passes between Earth and the Sun.
		It orbits Pluto at approximately a twentieth of the distance between Earth and the Moon, but whereas the Moon is one eightieth the weight of Earth, Pluto is only ten times the weight of Charon.
		Amalthea orbits close to the Roche limit, the point beyond which a planet would be disrupted by gravitational pull, and it is in fact elongated into an ellipsoidal shape, its long axis pointing towards Jupiter.
	infoman16.tripod.com /Articles/planmoons.htm (2968 words)

	[No title] (Site not responding. Last check: 2007-10-25)
		By making your entire orbit the same as the apoapsis of the station you can just flip to the target apoapsis option in the sync mfd later on and since you will always be at your targets ApD you can sync orbits wherever it reaches that altitude.
		Like I said earlier, you matched your orbit with the ISS's apoapsis so when you sync orbits your altitude will always be equal to the ISS's apoapsis and it does not matter where in your orbit it reaches that altitude.
		It is alright to match two times from your fourth or fifth orbits, I was significantly behind the ISS and had to wait for seven orbits to finally reach it.
	www.orbitersim.com /v2/read.asp?id=20604 (1153 words)

	Aali's Astrology Horoscopes Mercury Retrograde
		As Mercury 'passes' Earth due to its shorter orbit around the Sun, this "turbulence" energetically is created between the two planets for a brief (3 weeks) amount of time.
		Even though we can't see the energy and turbulence as a faster moving planet in orbit affects a slower moving planet in its orbit, the 'turbulence' is still the same.
		Actually, it is taking Mercury three weeks to approach earth in a parallel orbit (side by side like a team of horses) and as it nudges past earth with its planet body, and moves ahead, that is when it is said to be "direct" once again.
	www.astrology-horoscopes.co.uk /mercury-retrograde.htm (2307 words)

	mtmpt2
		Solar power is collected and beamed to the Sunflower satellite reciever in low Earth orbit; and from there to the planet.
		Fortunately; that did the trick, and using autopilot I was able to turn to the Orbit Normal position with a bare twenty seconds to go.
		I burned retrogade until we were frefalling towards the colony; 500 Km.
	www.eharm.net /shop/freeware/orbiter/adventure/mtmpt2/mtmpt2.html (1469 words)

	Self-Service Science Forum Message (Site not responding. Last check: 2007-10-25)
		For example, if the satellites are at the right height so that they orbit at the same rate that Earth spins, one will appear not to move at all, while the other appears to go twice as fast as it should.
		As the Earth orbits past the orbit of another planet, that planet's path across the sky appears to slow down stop and then reverse.
		Even without Newton, though, elliptical orbits of planets around the sun are easier to fit to planetary motions than orbits around the Earth, which require things like epicycles.
	www2.abc.net.au /science/k2/stn/posts/topic167187.shtm (2193 words)

	Pharyngula::Eppur si muove
		Whether Kepler murdered his boss or not, of course, has nothing to do with whether he was right about the planets moving in eliptical orbits.
		As Charlie notes, describing the entire solar system with the other planets orbiting in ellipses with sun at one focus is the simplest choice.
		Josh wrote: Geocentrism isn't merely the statement that the Earth is at the center of the universe and isn't rotating.
	pharyngula.org /index/weblog/comments/eppur_si_muove/P25 (2850 words)

	Computing planetary positions - a tutorial with worked examples
		the "tilt" of the orbit relative to the ecliptic.
		This is the angle, along the ecliptic, from the Vernal Point to the Ascending Node, which is the intersection between the orbit and the ecliptic, where the planet moves from south of to north of the ecliptic, i.e.
		Several planetary orbits have quite high eccentricities, which means we must use the iteration formula to obtain an accurate value of E. When we know E, we compute, as earlier, the distance r ("radius vector") and the true anomaly, v.
	www.njsas.org /projects/tidal_forces/altaz/pausch/tutorial.html (9998 words)

	mtmpt3
		Heading for orbit; Lunar Paradise Estates (an 'if-you-have-to-ask-you-can't-afford-it' condominium complex) in the background.
		In high orbit intercepting FSS Luna-OB1; crater Grimaldi in the background.
		You can't see them; but the station carries two giant solar arms at it's 'top' end with the comm dish at their hub.
	www.eharm.net /shop/freeware/orbiter/adventure/mtmpt3/mtmpt3.html (604 words)

	Venus' mysteries, another view. - Bad Astronomy and Universe Today Forum
		Venus' inclination of it's equator to its orbit is 0.5 degrees.
		This is due to some resonance overlap between the precession frequency and combinations of secular frequencies of the planetary orbits.
		The future passage of the Earth through the chaotic zone was analyzed as well (Ne´ron de Surgy and Laskar, 1997), and it was shown that our planet’s spin has a high probability to reach obliquities as high as 90° within a few billion years.
	www.bautforum.com /showthread.php?t=10879 (4361 words)

	A Question About Saturn? - Aeclectic Tarot Forum
		Because the radius of the orbits of the planets, our view of our celestial neighbors will sometimes catch them in a direct point-to-point linier view.
		But the planets don't stop, but because we are curving along the eclipbical orbit, our view of (in this case) Saturn is extended, but that extension also causes the body to move "backwards" in the sky thus the Retrograde label.
		It was the irregular obit that the denziens of the pre-columbian 'flat=Earth' that thought that these lights in the sky that did their own thing were Gods, hence why the planets were named for the ancient Pantheon.
	www.tarotforum.net /showthread.php?t=33301&goto=nextoldest (392 words)

	The Copernican Revolution and The Reformation
		Without going into too much detail here, the nature of the problems arose from the orbits of the planets not being circular, the planets travelling at different speeds (each planet's year is different), and that the Earth spins on its own axis at an angle to the plane of the orbits.
		Venus and Mars were always seen in close conjunction with the sun and were assumed therefore to lie between the Sun and the Earth, but they did not appear to pass in front of the Sun.
		Because of the elliptical paths and varying speeds of the planets at different points on the orbit (faster nearer the Sun) the planets often showed ‘retrogade motion’ (appearing to go back-wards due to the relative positions and speeds of the planets) which was quite inexplicable with a simple geocentric universe.
	www.tyndale.org /TSJ/4/marsden.html (2613 words)

	Index (Site not responding. Last check: 2007-10-25)
		Women in the GDR (East Germany) had significant gains in terms of education and social position, such as the high level of participation at upper levels of management in state-owned firms and political apparatus.
		The PDS, which capitalised on such sentiments, developed a relationship with the autonomen similar in nature to that which existed with the Greens/AL in the 1980s, and drew large numbers of squatters into their orbit, as members, sympathisers and workers on their political projects such as Junge Welt.
		The first expolores and critiques Negri, particularly with regard to his 'productivism', whereas the second concerns Seyla Benhabib and his wider claim that social movements prefigure relations destined to permeate society in the future.
	slash.autonomedia.org /print.pl?sid=03/02/16/2223203 (686 words)

	THE ASTRONOMICAL REVOLUTION AND THE BIRTH OF MODERN SCIENCE
		Coming back to Kepler, his life and personality are interesting enough to have inspired more than one novel, but we have enough time only to mention his celebrated laws of planetary motion, to which he arrived after a long, laborious analysis of Brahe's observations.
		Kepler's first law says that the planetary orbits are elliptical, with the sun at one focus.
		Here, then, we have one of the first examples of a phenomenon well known to scientists: something invented or discovered with one problem in mind, turns out, maybe 2,000 years later, to be precisely what one needs to solve a completely different problem.
	www.albany.edu /~rn774/fall96/science.html (3419 words)

	Your Guiding Planet - Mercury in Oriental Appearance - Michael R. Meyer - CyberWorld Khaldea
		Mercury is never more than 28 zodiacal degrees from the Sun, and it is retrogade only about ten-percent of the time.
		Additionally, the Sun and Mercury form a quintile (talent, skill) aspect to Uranus on the Ascendant and another quintile to Neptune (music, poetry, drugs and mysticism), and a bi-quintile between Neptune and Uranus completes a triangular configuration of quintile-based aspects with the Sun and Mercury pair at the apex.
		Because they are situated within earth’s orbit, Mercury and Venus are always near the sun in the sky, and therefore the two planets are more often seen in Oriental Appearance than any other planet.
	www.khaldea.com /planets/oriental_mercury.shtml (1187 words)

	Hypothetical Planets (Site not responding. Last check: 2007-10-25)
		Le Verrier investigated this observation, and computed an orbit from it: period 19 days 7 hours, mean distance from Sun 0.1427 a.u., inclination 12# 10', ascending node at 12# 59' The diameter was considerably smaller than Mercury's and its mass was estimated at 1/17 of Mercury's mass.
		Le Verrier's orbit indicated a possible transit at April 3 that year, and Wolf noticed that his 38-day orbit also could have performed a transit at about that time.
		In 1975, Charles Kowal at Palomar (discoverer of Chiron) photographed an object thought to be a new satellite of Jupiter.
	kvtr.elte.hu /tnp/nineplanets/hypo.html (8392 words)

	The Four Faces of Mercury - Introduction - Michael R. Meyer - CyberWorld Khaldea
		It was later refined and reformulated by Dane Rudhyar according to the humanistic approach to astrology.
		One of the first things a student of astrology learns about Mercury is that because its orbit lies inside the Earth’s, it is never more than twenty-eight zodiacal degrees from the Sun.
		Instead of forming a single conjunction and a single opposition with the Sun during each cycle, Mercury and Venus form with the Sun two different types of geocentric conjunctions—termed inferior and superior.
	www.khaldea.com /planets/merc_type.shtml (1096 words)

	Saturn Turning Direct on March 06 2004
		If you were born between June 25 through June 29th you are directly affected by this retrogade.
		So, even on a Saturn direct time, dreams you had long thought impossible, or given up on, are suddenly handed to you out of the blue.
		It's not unusual for Saturn, because of its large orbit about the Sun, to move over one's natal planet or position, then retrograde over it, and then come forward over it a third and final pass.
	www.astrostar.com /articles/SaturnTurningDirect_March06.2004.htm (1694 words)

	Cuba In A Caribbean Perspective
		As could be expected, there were also elements upholding retrogade ideas and positions in the Liberation Movement, like Calixto Garcia, a prominent general of the Cuban Liberation Army who was of European descent.
		It is clear that strictly applying class analysis could be convenient and could easily help to circumvent the debate on remaining racial questions of inequalities and priviliges, favoritism, nepotism and eurocentrism.
		On the other hand in the orbit of popular dance music one of the most outstanding African based creations that has not penetrated convincingly beyond Cuban borders is the "songo".
	www.afrocubaweb.com /EugeneGodfried/CubaCaribbean.htm (8264 words)

	Modern Predictions
		A company that blasted the first space tourists into orbit is offering future clients the chance to do a space walk.
		Astrologers, meanwhile, said their readings based on the alignment of planets showed that a calamity on that day was inevitable.
		The world faces a 70-per-cent risk of a weapon of mass destruction being used within the next decade, arms experts predict in a survey.
	home.att.net /~thehessians/5thsmonths.html (18936 words)

	What is a retrograde orbit?
		A retrograde orbit is an orbit where the satellite travels in an East to West direction instead of the common West to East orbit.
		Retrograde orbits are very uncommon due to the much higher velocities necessary for successful launch and the associated higher costs.
		Was our answer to What is a retrograde orbit?
	www.tech-faq.com /retrograde-orbit.shtml (65 words)

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