Planetary alignment of Venus, Mercury, and Saturn with the Giza Pyramids in Egypt. This phenomenon only happens once every 2,373-years and the next event is set for December 3, 2012, at one-hour before sunrise.
This is a rare meteorological phenomenon called a skypunch. When people see these, they think it's the end of the world. Ice crystals form above the high-altitude cirro-cumulo-stratus clouds, then fall downward, punching a hole in the cloud cover. #Meteorology #Weather #Clouds
Amazingly, a single day on Venus is longer than its entire year. It takes Venus 243 Earth days to completely rotate on its axis, but just 225 days to orbit the sun. Stranger still, Venus is one of two planets that rotates in reverse, a phenomenon called retrograde motion. Most theories attribute the reverse rotation to an ancient planetary collision.