The transit of the planet Venus across t
The transit of the planet Venus across the face of the sun is projected through a pair of binoculars onto a piece of paper outside Griffith Observatory in the Hollywood Hills area of Los Angeles, California June 5, 2012. Astronomers around the world are training their telescopes on the skies to watch Venus pass in front of the Sun, a once-in-a-lifetime event that will not be seen for another 105 years. AFP PHOTO / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/GettyImages)