space@mit-mc (02/22/85)
From: WOO IL LEE <lee@su-star> As far as I know, SSI (the commercial one) equipment has barely enough delta V to (maybe) reach some near-earth orbits. How are they going to reach solar escape velocity? Is somebody selling second-hand upper stages? Emilio P. Caalius Stanford Univ. ------
space@mit-mc (02/28/85)
From: <dual!amd!amdcad!fortune!hpda!hplabs!ames!al> Photon impact is the source of propulsion. Don't worry about meteors. Any material heavy enough to resist meteor impact is too heavy for photons to push around.