White light and Hydrogen Alpha light footage of the transit of Venus that took place on 5/6 June 2012. A transit of Venus happens when the planet Venus (2nd from the Sun) passes directly between the Sun and the Earth. From the Earth, we see Venus as a small black dot moving across the sun's surface. Transits of Venus are pretty rare. The last time one happened was back in June 2004. Next Venus transit will be on December 2117!