Charlie Green is right!! Daylight Savings time starts on the FIRST Sunday in April not the last. Legislation changed it from the last to the first Sunday in 1987. Google tells all and I must be stuck in a time warp. Beryllium is lighter than aluminum as well as lighter than glass and has a 1/3 higher modulus of elasticity than steel. The Spitzer telescope is in an earth FOLLOWING orbit that is taking it slowly away from the earth in nearly the same orbit around the sun. Also the Spitzer telescope itself, not just the mirrors are made almost entirely of beryllium. Clear Skies (hopefully) Daniel Turner --------------------------------- Do you Yahoo!? Yahoo! Small Business - Try our new resources site!