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Topic: Apsides


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 Apse (Mechanics) - LoveToKnow 1911
APSE and APSIDES, in mechanics, either of the two points of an orbit which are nearest to and farthest from the centre of motion.
They are called the lower or nearer, and the higher or more distant apsides respectively.
The "line of apsides" is that which joins them, forming the major axis of the orbit.
www.1911encyclopedia.org /Apse_%28Mechanics%29   (64 words)

  
  Year - Wikipedia, the free encyclopedia
The anomalistic year is the time for the Earth to complete one revolution with respect to its apsides.
The orbit of the Earth is elliptical; the extreme points, called apsides, are the perihelion, where the Earth is closest to the Sun (January 2 in 2000), and the aphelion, where the Earth is farthest from the Sun (July 2 in 2000).
Because of gravitational disturbances by the other planets, the shape and orientation of the orbit are not fixed, and the apsides slowly move with respect to a fixed frame of reference.
en.wikipedia.org /wiki/Year   (1602 words)

  
 NationMaster - Encyclopedia: Apoapsis
In astronomy, an apsis (plural apsides "ap-si-deez") is the point of greatest or least distance of the elliptical orbit of a celestial body from its center of attraction (the center of mass of the system).
The point of closest approach is called the periapsis and the point of farthest approach is the apoapsis.
A straight line drawn through the periapsis and apoapsis is the line of apsides.
www.nationmaster.com /encyclopedia/Apoapsis   (424 words)

  
 apsis
(pl. apsides), point in the orbit of a body where the body is neither approaching nor receding from another body about which it revolves.
In the orbit of the stars in a binary star system, the periastron is the point of closest approach and the apastron the point of farthest recession.
A line connecting the two apsidal points of an elliptical orbit (e.g., the aphelion and perihelion) is called the line of apsides; it is the major axis of the ellipse.
encyclopedia.variousstuff.net /articles/apsis.html   (166 words)

  
 Apsis - Wikipedia, the free encyclopedia
In astronomy, an apsis (plural apsides "ap-si-deez") is the point of greatest or least distance of the elliptical orbit of a celestial body from its center of attraction (the center of mass of the system).
The point of closest approach is called the periapsis or pericentre and the point of farthest approach is the apoapsis (Greek απο, from), apocentre or apapsis (the latter term, although etymologically more correct, is much less used).
A straight line drawn through the periapsis and apoapsis is the line of apsides.
en.wikipedia.org /wiki/Apsis   (592 words)

  
 iqexpand.com   (Site not responding. Last check: 2007-11-01)
The apogee and perigee of the Moon are apsides, as are the aphelion and perihelion of a planet.
APSIDES rzantine and the Latin apses; they are both semicircular th :ernally, but externally the former are nearly always poly- be nal.
apsides subject fact line of apsides is a kind of line has definition The major axis of an elliptical orbit.
apsides.iqexpand.com   (712 words)

  
 The S-basin   (Site not responding. Last check: 2007-11-01)
A remnant of the direct circular orbit appears as a resonance of 7 lower and 7 higher apsides, enclosed by the inner and outer lines of a KAM torus.
The corresponding islands formed by the higher apsides are too flat to be discernible in the figure.
It is a rule that stable, elliptic resonances have their higher apsides turned away from J so as to avoid the perturbation.
www-nonlinear.physik.uni-bremen.de /nlp/publications/ChaosHTML/r14richter/node15.html   (528 words)

  
 Basics of Time Reckoning
Perihelion and aphelion are called the apsides, connected by the line of apsides.
However, the speed of the apsides is very much slower than in the figure.
As for the earth's orbit around the sun there is also a line of apsides for the moon's orbit, which is the line between perigee and apogee.
www.ortelius.de /kalender/basic_en.php   (2997 words)

  
 apse --  Encyclopædia Britannica
also spelled apsis, plural apsides in astronomy, either of the two points on an elliptical orbit that are nearest to, and farthest from, the focus, or centre of attraction.
The line of apsides, connecting the two points, is the major axis of the orbit.
The point nearest the focus is the pericentre, or periapsis, and that farthest from it is the apocentre, or apoapsis.
www.britannica.com /eb/article-9008099?tocId=9008099   (601 words)

  
 Apsides - Qwika
The orbit of the Earth is elliptical; the extreme points, called apsides, are the perihelion, where the Earth is...
the orbit are not fixed, and the apsides slowly move with respect to a fixed...
erit angulus VCp inter easdem Apsides, in Orbe quem corpus vi centripeta quantitati...
www.qwika.com /find/Apsides   (380 words)

  
 Date:
A death for his "revolution" which was carried out like a resignation in a game of chess where the checkmate was certain but the loser refused to continue.
With these observations, the position of the Moon in relation to the Line of Apsides is very important in any chart interpretation to know how to approach the communication of the reading you wish to impart to the person you are reading for.
I personally feel that the aspects which may apply are the conjunction and the opposition which would fall on each end of the line.
www.transbay.net /~ballgame/writing/lineofapsides.htm   (741 words)

  
 Poleshifts (1)
A line drawn through the point of the earth's closest approach to the sun (perihelion) and farthest retreat (aphelion) -- the two apsides -- passes through the sun and is called the line of apsides or major axis of the orbit.
The line of apsides precesses slowly westward (anticlockwise) due, it is said, to the gravitational attraction of the other planets.
Whatever the earth's position in relation to the apsides at the time, say, of the vernal equinox in a particular year, it will return to the same relative position at the equinox not in 25,920 years but in only about 21,000 years, due to the movement of the apsides themselves.
ourworld.compuserve.com /homepages/dp5/pole1.htm   (4014 words)

  
 Satellite Coordinate Systems
eccentric anomaly, E - the angle between the line of apsides and the line joining the geometrical center of the ellipse with the projection of the satellite S' on a concentric circle of radius a.
The angle between the orbital half-plane and the celestial equator is known the angle of inclination, i.
The angle between the ascending nodal line and the line of apsides (counter-clockwise) is known as the argument of perigee, v.
surveying.wb.psu.edu /sur351/SatCoords/SatCoords.htm   (1427 words)

  
 The Temples of Malta
On the other hand, it is thought that the apsides were always covered on top.
The building of the apsides in the temples is always in a corbelled shape.
This temple consists of four rooms with four apsides and a niche in the middle.
www.edrichton.com /History/Temples.htm   (2572 words)

  
 The outside region   (Site not responding. Last check: 2007-11-01)
near the center, only the islands of the higher apsides can be discerned; those of the lower apsides are pressed against the inner boundary of the energy surface.
In the middle we plot the hyperbolic orbit with apsides on the negative
The reason is that at their lower apsides, they come close to the perturbing agent J. We observe here a general phenomenon.
www-nonlinear.physik.uni-bremen.de /nlp/publications/ChaosHTML/r14richter/node14.html   (587 words)

  
 Leonardo da Vinci/chiesa a pianta centrale con 4 campanili cilindrici   (Site not responding. Last check: 2007-11-01)
The plan of this temple is built up of an irregular octagon at the centre with four semi-circular apsides radiating from the four longest sides, and as many chapels opening into the shortest sides by means of short corridors.
This scheme for a centrally-planned temple – which bears some resemblance to others to be found in Leonardo’s manuscripts – was probably carried out between 1487 and 1490.
Four semi-circular apsides radiate from the longest sides of the octagon, while as many chapels are connected to the shortest sides by short corridors.
www.museoscienza.org /english/leonardo/piantacentrale.htm   (171 words)

  
 UNIVERSIDADE-SALAMANCA-COORDENARA-UM-PROJETO-PRATICAS-EM-EMPRESAS   (Site not responding. Last check: 2007-11-01)
A Universidade de Salamanca assumiu a coordenação do projeto APSIDES para a realização de práticas formativas de titulados em empresas européias e de Castilla e Leão financiado pela Consejería de Indústria, Comércio e Turismo, através da Agência de Desenvolvimento Econômico, em colaboração com as quatro universidades públicas de Castilla e León.
APSIDES se emoldura dentro do Programa Comunitário Leonardo da Vinci II, do que recebe um financiamento de 233.000 euros para apoiar a realização de um total de 91 estadias de seis meses em países da UE e países candidatos.
É de destacar que Apsides é o único projeto destas características que incluiu um programa de bolsas de volta, com o objetivo de que os titulados que tenham realizado estadias em empresas européias possam posteriormente inserir-se profissionalmente em empresas da região.
www.universia.es /html_trad/portada/actualidad/noticia_actualidad_trad/params/anyo/2002/mes/Octubre/noticia/fijhg.html   (191 words)

  
 apsides - OneLook Dictionary Search
Apsides : Online Plain Text English Dictionary [home, info]
apsides : Webster's Revised Unabridged, 1913 Edition [home, info]
Apsides : Eric Weisstein's World of Physics [home, info]
www.onelook.com /?w=apsides   (142 words)

  
 Constellation of elliptical orbit satellites with line of apsides lying in or near the equatorial plane - Patent 6457678   (Site not responding. Last check: 2007-11-01)
The present invention teaches a sun-synchronous satellite orbit having a line of apsides lying in or near (i.e., within 60 degrees) of the equatorial plane.
The line of apsides is a straight line joining the apogee and perigee points of the orbit.
More characteristics of retrograde, sun-synchronous elliptic orbits with line of apsides lying in or near the equatorial plane are described herein.
www.freepatentsonline.com /6457678.html   (3550 words)

  
 apsis
The closest point is the periapsis, the further point the apoapsis.
The line joining these points is called the line of apsides, and is another name for the major axis of the orbit.
Rotation of the line of apsides in the plane of the orbit is known as apsidal motion or advance of perihelion (in the case of a planet orbiting the Sun) or advance of pericenter (in the case of a binary star).
www.daviddarling.info /encyclopedia/A/apsis.html   (172 words)

  
 SeeSat-L Jun-00 : Definition of eccentricity in NORAD's 2-line   (Site not responding. Last check: 2007-11-01)
Background Earth's oblateness significantly perturbs the eccentricity of an orbit, as a strong function of orbital inclination and argument of perigee.
The oblateness also causes the line of apsides (long axis of the orbit) to rotate, as a strong function of inclination.
The practical effect of the oscillation in eccentricity is to cause the perigee distance to oscillate by as much as 15 km (for a quasi-polar orbit) during one rotation of the line of apsides; perigee will be closest when the argument of perigee is 90 deg, and furthest when argument of perigee is 270 deg.
www.satellite.eu.org /seesat/Jun-2000/0470.html   (432 words)

  
 > Perihelion abcworld.net   (Site not responding. Last check: 2007-11-01)
The point of closest approach is called the periapsis and the point of farthest approach is the apoapsis or apapsis (the latter term, although etymologically more correct, is much less used).
The most common are perigee and apogee, referring to Earth orbits, and perihelion and aphelion, referring to orbits around the Sun.
Apsides data for specific celestial bodies, such as Earth's perihelion and aphelion, are maintained in the articles on those bodies, such as Earth.
www.abcworld.net /Perihelion.html   (872 words)

  
 physics - Analemma   (Site not responding. Last check: 2007-11-01)
It is possible to construct an analemma by taking a photograph of the sun each day of the year at the same time and place and with a camera positioned in exactly the same way each time.
Plotting the analemma with the width exaggerated shows that it is slightly asymmetrical due to the misalignment of apsides and solstices.
The deviation between solar time and mean time is known as the equation of time and is due to the variation in the length of the synodic day, which is due to variation in the distance between the earth and the sun.
www.physicsdaily.com /physics/Analemma   (496 words)

  
 Apsidal motion   (Site not responding. Last check: 2007-11-01)
The major axis is also known as the line of apsides, and this rotation is called rotation of the apsides or advance of the periastron.
At time II the line of apsides has turned through 90 degrees and we get a symmetric eclipse, indistinguishable from a circular orbit.
After a time III the primary-secondary interval is long compared with the secondary-primary interval and after another quarter rotation the intervals become symmetric again.
www.physics.uq.edu.au /people/ross/phys2080/binary/apsides.htm   (259 words)

  
 NASA Cassini Significant Events for 09/14/06 - 09/20/06 | SpaceRef - Space News as it Happens
The line of apsides is a line which passes through both periapsis, Cassini's closest approach to Saturn in an orbit, and apoapsis, the farthest spot in the orbit from Saturn.
From T16 to T24, Titan gravity assists rotate the line of apsides while raising the spacecraft's orbital inclination to approximately 59 degrees, the amount required to perform the pi transfer.
From T25 to T33 on June 29, 2007, the line of apsides continues to rotate toward Saturn's lighted side as inclination is lowered back into Titan's orbit plane.
www.spaceref.com /news/viewsr.html?pid=22157   (1859 words)

  
 Apsides   (Site not responding. Last check: 2007-11-01)
In the accompanying diagram, i i show the apsides.
The earth and the other planets, as they revolve about the sun and reach these two points respectively, are said to be in aphelion and perihelion; and the moon in revolving about the earth is in apogee and perigee.
The line connecting the apsides, which is really the major axis of the orbit, is called the line of the apsides, and this has a slow, angular motion in the plane of the planet's orbit.
www.factopia.com /practical-reference/apsides.htm   (103 words)

  
 [No title]   (Site not responding. Last check: 2007-11-01)
In astronomy, an apsis (plural apsides) isthe point of greatest or least distance of the elliptical orbit of a celestial body from its centre of attraction (the centre of mass of the system).
The point ofclosest approach is called the periapsis and the point of farthest approach is the apoapsis.
The terms are formed from the Greek roots for the planet names rather than the Latin ones, since "peri" and "apo" are Greekand it is considered bad form to mix Greek and Latin roots.
immune-system-help.com /terms/orbit/perihelion.html   (334 words)

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