<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'><font color="#666699">My question is: under zero gravity, almost vacum space... will the boomerang motion in cirular will be eternity? <br /> Posted by lukman</font></DIV></p>The experiment took place inside the space station, not in a near vacuum. Even if it was not caught and did not hit the a wall, friction with the air in the station would slow it down. If the boomerang was thrown outside of the station, in the vacuum of space, there would be no aerodynamic effect and it would go into orbit around the Earth, like every other object thrown from the space station. <div class="Discussion_UserSignature"> </div>