Kepler's first law/Definition

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Revision as of 18:12, 3 May 2010 by imported>Peter Schmitt (New page: <noinclude>{{Subpages}}</noinclude> Planets move on paths that are ellipses which have the sun as a focus.)
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Kepler's first law [r]:

Planets move on paths that are ellipses which have the sun as a focus.