Prab: CSV import

2025-03-03T05:02:28Z

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			<gallery>
			File:Ecliptic with earth and sun animation.gif\|Ecliptic with earth and sun animation
			File:Earths orbit and ecliptic.svg\|Earth's orbit and ecliptic
			File:Obliquity of the ecliptic laskar.PNG\|Obliquity of the ecliptic laskar
			File:Ecliptic plane top view.gif\|Ecliptic plane top view
			File:Ecliptic plane side view.gif\|Ecliptic plane side view
			File:FourPlanetSunset hao annotated.JPG\|Four Planet Sunset hao annotated
			File:Ecliptic vs equator small.gif\|Ecliptic vs equator small
			File:Ecliptic inclination dziobek.PNG\|Ecliptic inclination dziobek
			File:Eclipse vs new or full moons, annotated.svg\|Eclipse vs new or full moons, annotated
			File:Optical effect march sunset - NOAA.jpg\|Optical effect march sunset - NOAA
			</gallery>

Prab: CSV import

2024-02-22T18:47:50Z

CSV import

New page

'''Ecliptic''' is the apparent path of the [[Sun]] on the celestial sphere, and is the basis for the ecliptic coordinate system. It also refers to the plane of this path, which is coplanar with both the orbit of the [[Earth]] around the Sun and the apparent orbit of the Sun around the Earth.

== Description ==

The ecliptic is actually the apparent path of the Sun throughout the course of a year. Because Earth takes one year to orbit the Sun, the apparent position of the Sun takes one year to make a complete circuit of the ecliptic. With slightly more than 365 days in one year, the Sun moves a little less than 1° eastward every day.

== Ecliptic Plane ==

The plane of Earth's orbit around the Sun is the most important reference plane when discussing the motion of bodies in our solar system. This plane, known as the ecliptic plane, is the basis of the ecliptic coordinate system.

== Ecliptic Coordinate System ==

The ecliptic coordinate system is a celestial coordinate system that uses the ecliptic for its fundamental plane. The system's origin can be the center of either the Sun or Earth, its primary direction is towards the vernal equinox, and it has a right-hand convention.

== Relation to the Celestial Equator ==

The ecliptic intersects the celestial equator, the projection of Earth's equator onto the celestial sphere, at two points: the vernal and autumnal equinoxes. The angle between the ecliptic and the celestial equator is approximately 23.44 degrees, and is known as the obliquity of the ecliptic.

== See Also ==

* [[Celestial sphere]]
* [[Celestial equator]]
* [[Equinox]]
* [[Solar System]]

== References ==

<references />

[[Category:Astronomy]]
[[Category:Celestial Mechanics]]
[[Category:Coordinate Systems]]

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← Older revision		Revision as of 05:02, 3 March 2025
Line 33:		Line 33:

	{{stub}}		{{stub}}
			<gallery>
			File:Ecliptic with earth and sun animation.gif\|Ecliptic with earth and sun animation
			File:Earths orbit and ecliptic.svg\|Earth's orbit and ecliptic
			File:Obliquity of the ecliptic laskar.PNG\|Obliquity of the ecliptic laskar
			File:Ecliptic plane top view.gif\|Ecliptic plane top view
			File:Ecliptic plane side view.gif\|Ecliptic plane side view
			File:FourPlanetSunset hao annotated.JPG\|Four Planet Sunset hao annotated
			File:Ecliptic vs equator small.gif\|Ecliptic vs equator small
			File:Ecliptic inclination dziobek.PNG\|Ecliptic inclination dziobek
			File:Eclipse vs new or full moons, annotated.svg\|Eclipse vs new or full moons, annotated
			File:Optical effect march sunset - NOAA.jpg\|Optical effect march sunset - NOAA
			</gallery>

Ecliptic - Revision history

Prab: CSV import

Prab: CSV import