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%ما هو (من)٪ 1 - تعريف
APPARENT PATH OF THE SUN ON THE CELESTIAL SPHERE
Plane of the ecliptic; Astronomical ecliptic; Ecliptic circle; Ecliptic plane; Plane of ecliptic; Eclyptic
![polar axis]] (green). The plane of the ecliptic intersects the celestial sphere along a [[great circle]] (black), the same circle on which the Sun seems to move as Earth orbits it. The intersections of the ecliptic and the equator on the celestial sphere are the vernal and autumnal [[equinox]]es (red), where the Sun seems to cross the celestial equator.](https://commons.wikimedia.org/wiki/Special:FilePath/Earths orbit and ecliptic.PNG?width=200 "polar axis]] (green). The plane of the ecliptic intersects the celestial sphere along a [[great circle]] (black), the same circle on which the Sun seems to move as Earth orbits it. The intersections of the ecliptic and the equator on the celestial sphere are the vernal and autumnal [[equinox]]es (red), where the Sun seems to cross the celestial equator.")
![tilted]] five degrees to the ecliptic) results in the revolution of the [[lunar nodes]] relative to the Earth. This causes an [[eclipse season]] approximately every six months, in which a [[solar eclipse]] can occur at the [[new moon]] phase and a [[lunar eclipse]] can occur at the [[full moon]] phase.](https://commons.wikimedia.org/wiki/Special:FilePath/Eclipse vs new or full moons, annotated.svg?width=200 "tilted]] five degrees to the ecliptic) results in the revolution of the [[lunar nodes]] relative to the Earth. This causes an [[eclipse season]] approximately every six months, in which a [[solar eclipse]] can occur at the [[new moon]] phase and a [[lunar eclipse]] can occur at the [[full moon]] phase.")
![url = https://books.google.com/books?id=WTEaAAAAYAAJ&q=dziobek+mathematical}}, p. 294, at Google books</ref> This is the inclination to the ecliptic of 101,800 CE. Note that the ecliptic rotates by only about 7° during this time, whereas the [[celestial equator]] makes several complete cycles around the ecliptic. The ecliptic is a relatively stable reference compared to the celestial equator.](https://commons.wikimedia.org/wiki/Special:FilePath/Ecliptic inclination dziobek.PNG?width=200 "url = https://books.google.com/books?id=WTEaAAAAYAAJ&q=dziobek+mathematical}}, p. 294, at Google books</ref> This is the inclination to the ecliptic of 101,800 CE. Note that the ecliptic rotates by only about 7° during this time, whereas the [[celestial equator]] makes several complete cycles around the ecliptic. The ecliptic is a relatively stable reference compared to the celestial equator.")
![equatorial coordinates]] (blue), being inclined to the ecliptic, appear to wobble as the Sun advances.](https://commons.wikimedia.org/wiki/Special:FilePath/Ecliptic vs equator small.gif?width=200 "equatorial coordinates]] (blue), being inclined to the ecliptic, appear to wobble as the Sun advances.")
Ecliptic
·adj Pertaining to an eclipse or to eclipses.
II. Ecliptic ·adj Pertaining to the ecliptic; as, the ecliptic way.
III. Ecliptic ·adj A great circle drawn on a terrestrial globe, making an angle of 23° 28' with the equator;
- used for illustrating and solving astronomical problems.
IV. Ecliptic ·adj A great circle of the celestial sphere, making an angle with the equinoctial of about 23° 28'. It is the apparent path of the sun, or the real path of the earth as seen from the sun.
Ecliptic
The ecliptic is the plane of Earth's orbit around the Sun. From the perspective of an observer on Earth, the Sun's movement around the celestial sphere over the course of a year traces out a path along the ecliptic against the background of stars.
Orbital pole
DIRECTION OF IMAGINARY PROJECTION ONTO THE REMOTE CELESTIAL SPHERE OF THE LINE PERPENDICULAR TO PLANET EARTH'S ORBITAL PLANE AND PASSING THOUGH THE ORBITAL CENTER
Ecliptic pole; Ecliptic north pole; Ecliptical pole; Poles of the ecliptic; North Ecliptic Pole; South Ecliptic Pole; North ecliptic pole; Orbital normal
An orbital pole is either point at the ends of an imaginary line segment that runs through the center of an orbit (of a revolving body like a planet, moon or satellite) and is perpendicular to the orbital plane. Projected onto the celestial sphere, orbital poles are similar in concept to celestial poles, but are based on the body's orbit instead of its equator.
ويكيبيديا
Ecliptic
The ecliptic or ecliptic plane is the orbital plane of Earth around the Sun. From the perspective of an observer on Earth, the Sun's movement around the celestial sphere over the course of a year traces out a path along the ecliptic against the background of stars. The ecliptic is an important reference plane and is the basis of the ecliptic coordinate system.
