http://marspedia.org/index.php?action=history&feed=atom&title=ConjunctionConjunction - Revision history2026-07-01T00:47:17ZRevision history for this page on the wikiMediaWiki 1.43.8http://marspedia.org/index.php?title=Conjunction&diff=131122&oldid=prevMichel Lamontagne at 18:03, 5 August 20192019-08-05T18:03:38Z<p></p>
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</table>Michel Lamontagnehttp://marspedia.org/index.php?title=Conjunction&diff=125896&oldid=prevJburk at 15:47, 10 July 20182018-07-10T15:47:40Z<p></p>
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</table>Jburkhttp://marspedia.org/index.php?title=Conjunction&diff=8217&oldid=prevChristiaanK: Created page2013-02-06T16:28:50Z<p>Created page</p>
<p><b>New page</b></p><div>'''Conjunction''' and '''opposition''' refer to to possible states in the relative positions of an observer and a planet or an observer and two planets. The observer is, of course, usually looking from the surface of the Earth.<br />
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==Superior planet==<br />
When a planet is superior to the observer (meaning that the orbit of the observer is contained within that of the planet), the planet is in '''conjunction''' when it is in the same direction as the sun (i.e. behind it). The planet is in '''opposition''' when it is in the opposite direction from the sun.<br />
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==Inferior planet==<br />
When a planet is inferior to the observer (meaning that the orbit of the planet is contained within that of the observer), the planet is in '''superior conjunction''' when the sun is between it and the observer. It is in '''inferior conjunction''' when between the observer and the sun.<br />
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==Two planets==<br />
Two planets are said to be in '''conjunction''' when they are in the same direction and in '''opposition''' when in opposite directions, as seen by the observer.<br />
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==References==<br />
J.R. Wertz - ''Orbits and astrodynamics'' J.R. Wertz, D.F. Everett & J.J. Puschell eds. ''Space mission engineering: The new SMAD'' 2011. ISBN 978-1-881883-15-9 p. W9/1.<br />
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[[Category:Astronomical Observations]]<br />
[[Category:Orbital Mechanics]]</div>ChristiaanK