I'm not even sure how to reply to this, but I can give it a shot <img src="/images/icons/smile.gif" /><br /><br />I can see what you're saying about each individual body with mass being within its own time frame. However, It would only be perceivable on large scales. For instance, black holes might be very good evidence for this. As an objects mass becomes larger and larger, its escape velocity becomes higher and higher. <br /><br />For example, if you're being pulled straight towards the Sun, time would run slower than it does if you're being pulled towards Earth. With a black hole, when you come closer and closer to the event horizon, time will tick slower and slower. Until, you reach the inevitable point of the event horizon, when time may stop as you reach the speed of light. <br /><br />As for relating that to the missing mass in the galaxy, I haven't got a clue, give Mr. Hawking a call <img src="/images/icons/smile.gif" /> <div class="Discussion_UserSignature"> <p> </p><p><strong><font color="#ff0000">Techies: We do it in the dark. </font></strong></p><p><font color="#0000ff"><strong>"Put your hand on a stove for a minute and it seems like an hour. Sit with that special girl for an hour and it seems like a minute. That's relativity.</strong><strong>" -Albert Einstein </strong></font></p> </div>