Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

What is retrograde planetary perihelion precession?

  1. Jun 19, 2011 #1
    I know what each word mean independently, I'm just confused as to what sort of motion is trying to be described as a whole.
  2. jcsd
  3. Jun 19, 2011 #2


    User Avatar
    Science Advisor
    Homework Helper

    hi magheera! :smile:

    perihelion precession means that the perihelion moves slightly each orbit

    usually, this is prograde, which means in the same direction as the orbit itself

    retrograde means the perihelion moves in the opposite direction to the orbit
  4. Jun 19, 2011 #3
    fantastic! Thanks so much.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: What is retrograde planetary perihelion precession?
  1. Precession of perihelion (Replies: 15)

  2. Retrograde Motion (Replies: 2)