User talk:75.63.152.34

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February 2012[edit]

Hello, and welcome to Wikipedia. Although everyone is welcome to contribute to Wikipedia, at least one of your recent edits, such as the one you made to Retrograde motion with this edit, did not appear to be constructive, and has been reverted or removed. Please use the sandbox for any test edits you would like to make, and read the welcome page to learn more about contributing constructively to this encyclopedia. Thank you. QU TalkQu 23:17, 14 February 2012 (UTC)