Pretty much. <img src="/images/icons/wink.gif" /><br /><br />The main reason they pack the trash (including "waste" from the toilet) into the Progress instead of just spacing it is because you don't want any more random bits of junk floating around than absolutely neccesary. Each piece is a potential collision hazard. The Progress, on the other hand, has propulsion. It can steer itself clear of collisions and deorbit itself in a controlled fashion.<br /><br />But space travellers weren't always so thoughtful, and <i>did</i> space their waste. I seem to recall a post from somebody talking about a dinged Orbiter window that turned out to be due to a collision with frozen cosmonaut "business". <div class="Discussion_UserSignature"> <p> </p><p><font color="#666699"><em>"People assume that time is a strict progression of cause to effect, but actually from a non-linear, non-subjective viewpoint it's more like a big ball of wibbly wobbly . . . timey wimey . . . stuff."</em> -- The Tenth Doctor, "Blink"</font></p> </div>