Plasma propulsion may very well be our ticket to visit those little green men on Mars, which is why NASA is becoming besties with Ad Astra, makers of the VASIMR VX-200 plasma rocket. After successful terrestrial testing, the next step is to try out a VF-200 flight model in space -- and a new agreement gives NASA engineers access to VASIMR while letting Ad Astra leverage NASA's spacecraft expertise to get it into orbit. The plasma rocket was assumed to be destined for use on the International Space Station because it require
