Portal:Astronomy/Featured/August 2005
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Transits of Venus are rare and occur in a pattern that repeats every 243 years, with pairs of transits 8 years apart separated by long gaps of 121.5 years and 105.5 years. The pattern repeats every 243 years because after this time both Venus and Earth have returned to very nearly the same point in each of their respective orbits. This period of time corresponds to 152
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