Science - What is the rotation of Mars, Mercury, Venus, and Earth?

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1. 
   cp5467 Student
   High School - 12th Grade

   Venus has a retrograde rotation and rotates 243 times in one full orbit. 

   Mars in Retrograde happens the least frequently of any other planet in the solar system, but its duration is the longest of the personal planets (Mercury, Venus & Mars), being retrograde for approximately 2.5 months almost every 2 years.

   Every four months, Mercury stations and turns retrograde, remaining so for approximately twenty-two days.

   Earth, obviously, rotates 365 times in one orbit around the sun.

   Sources:

   http://www.innerself.com/Astrology/mercury_01023.htm

   http://www.truewindshealing.com/blog/category/mars-retrog...

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   Posted by cp5467 on Tuesday April 29, 2008 at 5:15 AM
   
   

2. 
   bobolin Teacher
   High School - 12th Grade

   I think you can use a good source from here

   http://www.goldenessays.com/free_essays/1/astronomy/solar-system-planets.shtml

    

   Good luck

   Sources:

   http://www.astronomyknowhow.com/resources/solar-system.htm

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   Posted by bobolin on Friday May 9, 2008 at 11:34 AM