Portal:Outer space/Selected article/36
A on 5 and 6 June 2012; the next will be 10–11 December 2117. Historically, Venus transits were of great scientific importance as they were used to gain the first realistic estimates of the size of the Solar System. The 2012 transit provided scientists with a number of other research opportunities, particularly in the refinement of techniques to be used in the search for exoplanets.