Also interesting will the transit of December 9, 2056, when Mercury barely misses transiting the Sun, but Venus begins an actual transit about six hours later.
== Riferimenti ==* Albert Marth, "Note on the Transit of Mercury over the Sun’s Disc, which takes place for Venus on 1894 March 21, and on the Transits of Venus and Mercury, which occur for Saturn’s System on the same day", Monthly Notices of the Royal Astronomical Society, 54 (1894), 172–174.