2013-06-22T18:43:06ZFluxBBhttp://www.mathisfunforum.com/viewtopic.php?id=19668Hmm]]>http://www.mathisfunforum.com/profile.php?id=959042013-06-22T18:43:06Zhttp://www.mathisfunforum.com/viewtopic.php?pid=275561#p275561http://en.wikipedia.org/wiki/Observer_%28special_relativity%29]]>http://www.mathisfunforum.com/profile.php?id=975782013-06-22T18:39:25Zhttp://www.mathisfunforum.com/viewtopic.php?pid=275557#p275557Define an observer]]>http://www.mathisfunforum.com/profile.php?id=959042013-06-22T13:04:01Zhttp://www.mathisfunforum.com/viewtopic.php?pid=275468#p275468