With patience, the ion propulsion system on Deep Space One imparts about 3.6 km/s to the spacecraft. To undertake the same mission with a chemical pro...ulsion system would require a more expensive launch vehicle and a larger spacecraft to accommodate a large tank for the chemical propellants.'"Again Karl switched slides.This slide has a couple of interesting questions. "How much time would a spacecraft using ion propulsion take to get to Mars? Can the technology be used for a manned mission to. It’s really distracting. She hadn’t noticed it before, but now the leather collar seemed to be constricting her breathing somewhat. Was it because she was so excited? No, now it was definitely getting tighter. Maybe she was kneeling on the leash… She started to turn her head to look, but suddenly the pressure on her throat increased ten-fold, forcing her head upward–and then she realized… someone had taken hold of the leash! Oh god… She started to gasp out loud, but at that instant a large. More

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