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[[File:lighterstill.jpg]][[File:Lunar_Eclipse.jpg|right|frame]]

[[File:lighterstill.jpg]][[File:Lunar_Eclipse.jpg|right|frame]]

An '''eclipse''' is an [[astronomical]] [[event]] that occurs when one [[celestial]] object moves into the [[shadow]] of another. The term is derived from the ancient [[Greek]] noun ἔκλειψις (ékleipsis), which is derived from the verb ἐκλείπω (ekleípō), "to cease to [[exist]],"[1] a combination of prefix εκ- (ek-), from preposition εκ, εξ (ek, ex), "out," and of verb λείπω (leípō), "to be [[absent]]".[2] [3] When an eclipse occurs within a stellar [[system]], such as the [http://en.wikipedia.org/wiki/Solarsystem solar system], it forms a type of syzygy—the alignment of three or more celestial bodies in the same [[gravitational]] system along a straight line.[4]

An '''eclipse''' is an [[astronomical]] [[event]] that occurs when one [[celestial]] object moves into the [[shadow]] of another. The term is derived from the ancient [[Greek]] noun ἔκλειψις (ékleipsis), which is derived from the verb ἐκλείπω (ekleípō), "to cease to [[exist]],"[1] a combination of prefix εκ- (ek-), from preposition εκ, εξ (ek, ex), "out," and of verb λείπω (leípō), "to be [[absent]]".[2] [3] When an eclipse occurs within a stellar [[system]], such as the [https://en.wikipedia.org/wiki/Solarsystem solar system], it forms a type of syzygy—the alignment of three or more celestial bodies in the same [[gravitational]] system along a straight line.[4]

The term eclipse is most often used to describe either a solar eclipse, when the [http://en.wikipedia.org/wiki/Moon Moon's] [[shadow]] crosses the [[Earth]]'s surface, or a lunar eclipse, when the Moon moves into the shadow of Earth. However, it can also refer to such events beyond the Earth-Moon system: for example, a planet moving into the shadow cast by one of its moons, a moon passing into the shadow cast by its host [[planet]], or a moon passing into the shadow of another moon. A [http://en.wikipedia.org/wiki/Binary_Star binary star] system can also produce eclipses if the plane of their orbit intersects the position of the [[observer]].[http://en.wikipedia.org/wiki/Eclipse]

The term eclipse is most often used to describe either a solar eclipse, when the [https://en.wikipedia.org/wiki/Moon Moon's] [[shadow]] crosses the [[Earth]]'s surface, or a lunar eclipse, when the Moon moves into the shadow of Earth. However, it can also refer to such events beyond the Earth-Moon system: for example, a planet moving into the shadow cast by one of its moons, a moon passing into the shadow cast by its host [[planet]], or a moon passing into the shadow of another moon. A [https://en.wikipedia.org/wiki/Binary_Star binary star] system can also produce eclipses if the plane of their orbit intersects the position of the [[observer]].[https://en.wikipedia.org/wiki/Eclipse]

== External links ==

== External links ==

* [http://www.phys.uu.nl/~vgent/eclipse/eclipsecycles.htm A Catalogue of Eclipse Cycles]

* [https://www.phys.uu.nl/~vgent/eclipse/eclipsecycles.htm A Catalogue of Eclipse Cycles]

* [http://www.hermit.org/Eclipse/when_search.shtml Search 5,000 years of eclipses]

* [https://www.hermit.org/Eclipse/when_search.shtml Search 5,000 years of eclipses]

* [http://sunearth.gsfc.nasa.gov/eclipse/eclipse.html NASA eclipse home page]

* [https://sunearth.gsfc.nasa.gov/eclipse/eclipse.html NASA eclipse home page]

* [http://www.eclipses.info International Astronomical Union's Working Group on Solar Eclipses]

* [https://www.eclipses.info International Astronomical Union's Working Group on Solar Eclipses]

* [http://www.markstravelnotes.com/travelogues/eclipse_chasing/ Mark's eclipse chasing website]

* [https://www.markstravelnotes.com/travelogues/eclipse_chasing/ Mark's eclipse chasing website]

* [http://xjubier.free.fr/en/site_pages/SolarEclipsesGoogleMaps.html Interactive eclipse maps site]

* [https://xjubier.free.fr/en/site_pages/SolarEclipsesGoogleMaps.html Interactive eclipse maps site]

===Image galleries===

===Image galleries===

* [http://www.perseus.gr/Astro-Eclipses.htm Solar and Lunar Eclipse Image Gallery]

* [https://www.perseus.gr/Astro-Eclipses.htm Solar and Lunar Eclipse Image Gallery]

* [http://www.williams.edu/astronomy/eclipse Williams College eclipse collection of images]

* [https://www.williams.edu/astronomy/eclipse Williams College eclipse collection of images]

* [http://www.zam.fme.vutbr.cz/~druck/Eclipse/ Prof. Druckmüller's eclipse photography site]

* [https://www.zam.fme.vutbr.cz/~druck/Eclipse/ Prof. Druckmüller's eclipse photography site]

[[Category: Astronomy]]

[[Category: Astronomy]]