>You obviously have never been involved in a low budget under manned program that involves major modifications to an operational aircraft.<<br /><br />Not to mention hull configuration change inflight. The side opens up to the atmosphere so the telescope can get a clean look. I can only imagine what flight safety issues are involved with having part of your fuselage open to...what 40,000 ft or 50,000 ft? Guess they have to make sure the area where the telescope is is fully decompressed before opening it, lest they have an 'explosive' decompression and ruin the telescope and maybe harm the crew and the plane. <div class="Discussion_UserSignature"> <p> </p><p><font color="#0000ff"><em>"SCE to AUX" - John Aaron, curiosity pays off</em></font></p> </div>