Photograph of the transit of Venus over Tadoule Lake taken at 7 p.m. on June 5 through a welder's mask. Transits of Venus occur in pairs Ė the last one happened in 2004 and the next pair will not appear until 2117 and 2125. The transit didnít significantly block the sun's light but it gave the Earth's closest star something akin to a moving beauty mark. This was the seventh visible transit of Venus since German astronomer Johannes Kepler first predicted the phenomenon in the 17th century. Because of the shape and speed of Venus's orbit around the sun and its relationship to Earth's annual trip, transits occur in pairs separated by more than a century.