What is retrograde motion?   via Shareaholic

What is retrograde motion? via Shareaholic

Venus is one unique planet when it comes to rotational motion. It takes Venus 243 Earth days to completely rotate on its axis, but just 225 days to orbit the sun. Venus also is one of two planets that rotates in reverse, a phenomenon called retrograde motion, which according to most theories is due to an ancient planetary collision.

Venus is one unique planet when it comes to rotational motion. It takes Venus 243 Earth days to completely rotate on its axis, but just 225 days to orbit the sun. Venus also is one of two planets that rotates in reverse, a phenomenon called retrograde motion, which according to most theories is due to an ancient planetary collision.

Animation of the apparent retrograde motion of Mars in 2003 as seen from Earth

Animation of the apparent retrograde motion of Mars in 2003 as seen from Earth

Apparent Retrograde Motion of Mars - This animation shows the apparent retrograde motion of Mars in 2003, as seen from Earth - Created by : Eugene Alvin Villar (seav), as part of the Philip Greenspun illustration project

Apparent Retrograde Motion of Mars - This animation shows the apparent retrograde motion of Mars in 2003, as seen from Earth - Created by : Eugene Alvin Villar (seav), as part of the Philip Greenspun illustration project

http://earthsky.org/space/what-is-retrograde-motion

http://earthsky.org/space/what-is-retrograde-motion

“Eye of God” Nebula, Auroras, Planetary Orbits, Formation of Solar System and Retrograde motion of planets presented with eye catching GIFs

“Eye of God” Nebula, Auroras, Planetary Orbits, Formation of Solar System and Retrograde motion of planets presented with eye catching GIFs

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