Editing Conjunction (astronomy) (section)

==Passing close==
[[File:Planetary Conjunction over Paranal.jpg|thumb|A conjunction of Mars and Jupiter in the morning of 1 May 2011, when, about an hour before sunrise, five of the Solar System's eight planets and the Moon could be seen from [[Cerro Paranal]], Chile.<ref>{{cite web|title=Planetary Conjunction over Paranal|url=http://www.eso.org/public/images/potw1118a/|work=ESO Picture of the Week|publisher=ESO|access-date=2011-05-02}}</ref>]]

More generally, in the particular case of two [[planet]]s, it means that they merely have the same [[right ascension]] (and hence the same [[hour angle]]). This is called conjunction in right ascension. However, there is also the term conjunction in ecliptic longitude. At such conjunction both objects have the same ecliptic longitude. Conjunction in right ascension and conjunction in ecliptic longitude do not normally take place at the same time, but in most cases nearly at the same time. However, at [[triple conjunction]]s, it is possible that a conjunction only in right ascension (or ecliptic length) occurs. At the time of conjunction&nbsp;– it does not matter if in right ascension or in ecliptic longitude&nbsp;– the involved planets are close together upon the [[celestial sphere]]. In the vast majority of such cases, one of the planets will appear to pass north or south of the other.