In the ancient world, the Circle was seen as the ideal form, so it influenced the view of the Solar System and the vision of heavens. Ptolemy’s geocentric model, which was the prevailing view of the Solar System and.
Venus - one day 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. Venus is one of two planets that rotates in reverse, called retrograde motion.
Apparent Retrograde Motion of Mars - This animation shows the apparent retrograde motion of Mars in as seen from Earth - Created by : Eugene Alvin Villar (seav), as part of the Philip Greenspun illustration project