User talk:Derek8520

March 2010
Welcome to Wikipedia. The recent edit that you made to the page Callisto (moon) has been reverted, as it appears to be unconstructive. Please use the sandbox for testing any edits; if you believe the edit was constructive, please ensure that you provide an informative edit summary. You may also wish to read the introduction to editing for further information. Thank you. Bradjamesbrown (talk) 17:56, 2 March 2010 (UTC)