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Synodic day
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==Venus== {{Further|Venus#Orbit and rotation}} Due to the slow [[retrograde motion|retrograde]] [[rotational speed]] of [[Venus]], its synodic [[rotation period]] of 117 Earth days is about half the length of its [[sidereal time|sidereal]] rotational period (sidereal day) and even its orbital period.<ref name="Venusday">{{cite web | title=How long is a day on Venus? | website=TE AWAMUTU SPACE CENTRE | url=https://www.spacecentre.nz/resources/faq/solar-system/venus/day.html | access-date=2021-06-03}}</ref>
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