Editing Orbit (section)

==External links==
{{Wiktionary}}
{{Commons|Orbits}}
* [http://www.calctool.org/CALC/phys/astronomy/planet_orbit CalcTool: Orbital period of a planet calculator]. Has wide choice of units. Requires JavaScript.
* [http://www.phy.hk/wiki/englishhtm/Motion.htm Java simulation on orbital motion]. Requires Java.
* [http://www.ncdc.noaa.gov/paleo/forcing.html NOAA page on Climate Forcing Data] includes (calculated) data on Earth orbit variations over the last 50 million years and for the coming 20 million years
* [https://web.archive.org/web/20100201160808/http://www.bridgewater.edu/~rbowman/ISAW/PlanetOrbit.html On-line orbit plotter]. Requires JavaScript.
* [https://web.archive.org/web/20120204054322/http://www.braeunig.us/space/orbmech.htm Orbital Mechanics] (Rocket and Space Technology)
* [https://web.archive.org/web/20060210012245/http://www.astrobiology.ucla.edu/OTHER/SSO/ Orbital simulations] by Varadi, [[Michael Ghil|Ghil]] and Runnegar (2003) provide another, slightly different series for Earth orbit eccentricity, and also a series for orbital inclination. Orbits for the other planets were also calculated, by {{cite journal | author=F. Varadi | author2=B. Runnegar | author3=M. Ghil | title=Successive Refinements in Long-Term Integrations of Planetary Orbits | journal=The Astrophysical Journal | volume=592 | date=2003 | issue=1 | pages=620–630|doi=10.1086/375560 | bibcode=2003ApJ...592..620V| doi-access=free }}, but only the [https://web.archive.org/web/20041031055131/http://www.astrobiology.ucla.edu/OTHER/SSO/Misc/ eccentricity data for Earth and Mercury] are available online.
* [http://www.lri.fr/~dragice/gravity/ Understand orbits using direct manipulation] {{Webarchive|url=https://web.archive.org/web/20171108140606/http://www.lri.fr/~dragice/gravity/ |date=8 November 2017 }}. Requires JavaScript and Macromedia
* {{cite web|last=Merrifield|first=Michael|title=Orbits (including the first manned orbit)|url=http://www.sixtysymbols.com/videos/orbit.htm|work=Sixty Symbols|publisher=[[Brady Haran]] for the [[University of Nottingham]]}}

{{Orbits}}
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[[Category:Orbits| ]]
[[Category:Celestial mechanics]]
[[Category:Periodic phenomena]]
[[Category:Gravity]]
[[Category:Astrodynamics]]
[[Category:Concepts in astronomy]]