Venus’s transit over the sun occurs when planet Venus positions itself between the Sun and the Earth, kinda like the solar eclipse we had a few weeks back.
The timing of this astrological phenomena is kinda weird, a couple of transits 8-years-apart occurs every 105 (or 121) years. So the next transit of Venus across the Sun won’t take place until 2117. This is plenty of notice – about a centery worth – but if you get to the last minute and still find yourself unprepared here is a neat fast trick from Jeff Finkelstein to get you back on your feet.
Here is the image of the Venus Transit, with my DIY $2.00 rig