The next transit of Venus occurs June 5 or 6. Key highlights include the four "contacts" near the beginning and end of the transit when Venus appears to touch the edge of the sun. Most of North America sees the beginning of the transit in the afternoon and evening on June 5, whereas much of Eurasia sees the end of the transit in the morning on June 6., 2012, depending on your location.
Locations and dates of best viewing of Venus transit
If you miss this opportunity to view the transit there won't be another chance until 2017.
click image of Venus for more on our sister planet