Explore BrainMass

Explore BrainMass

    Planet retrograde motion, Earth-center, Sun-center

    Not what you're looking for? Search our solutions OR ask your own Custom question.

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    How can planet retrograde motion be explained by the Earth-center hypothesis? By the Sun-center hypothesis?

    © BrainMass Inc. brainmass.com September 29, 2022, 12:58 pm ad1c9bdddf

    Solution Preview

    There is a very good explanation on the web:


    In a few words, one can summarize as follows: in most cases, planets wander from west to east on the sky, but sometimes they slow down for awhile, stop, move from east to west (this is the retrograde motion), slow down ...