[Houston, TX. For immediate release] - The National Aeronautics and Space Administration (NASA) and Ad Astra Rocket Company of Webster, Texas have entered into a Space Act Agreement that could lead to conducting a space flight test of the Variable Specific Impulse Magnetoplasma Rocket (VASIMR(TM)) engine on the International Space Station (ISS). The VASIMR(TM) engine is a new plasma-based space propulsion technology, initially studied by NASA and currently under commercial development by Ad Astra. The agreement was fully executed on December 8, 2008. It was signed on behalf of NASA by its Associate Administrator for Space Operations, William H. Gerstenmaier...