Editing Eclipse (section)

===Mercury and Venus===
Eclipses are impossible on [[Mercury (planet)|Mercury]] and [[Venus]], which have no moons. However, as seen from the Earth, both have been observed to [[Astronomical transit|transit]] across the face of the Sun. [[Transit of Venus|Transits of Venus]] occur in pairs separated by an interval of eight years, but each pair of events happen less than once a century.<ref>{{cite web |last=Espenak |first=Fred |date=May 29, 2007 |url=http://sunearth.gsfc.nasa.gov/eclipse/transit/transit.html |title=Planetary Transits Across the Sun |publisher=NASA |access-date=2008-03-11 |url-status=dead |archive-url=https://web.archive.org/web/20080311033452/http://sunearth.gsfc.nasa.gov/eclipse/transit/transit.html |archive-date=March 11, 2008 }}</ref> According to NASA, the next pair of Venus transits will occur on December 10, 2117, and December 8, 2125. [[Transit of Mercury|Transits of Mercury]] are much more common, occurring 13 times each century, on average.<ref>{{Cite web|url=https://eclipse2017.nasa.gov/when-will-next-transits-mercury-and-venus-occur-during-total-solar-eclipse|title=When will the next transits of Mercury and Venus occur during a total solar eclipse? {{!}} Total Solar Eclipse 2017|website=eclipse2017.nasa.gov|language=en|access-date=2017-09-25|url-status=dead|archive-url=https://web.archive.org/web/20170918151937/https://eclipse2017.nasa.gov/when-will-next-transits-mercury-and-venus-occur-during-total-solar-eclipse|archive-date=2017-09-18}}</ref>