Tags Dr. Franklin Chang Diaz Dr. Erik Seedhouse To Mars And Beyond, Fast! plasma propulsion space exploration VASIMR (Variable Specific Impulse Magnetoplsma Rocket) Ad Astra Ad Astra Rocket Company nuclear electric propulsion solar electric power gas fuels hydrogen argon krypton space demonstration ISS NASA grant Earth-Moon system LaGrange point VASIMR interstellar potential thermonuclear power mass to Mars TRL Ad Astra funding ITAR foreign Ad Astra offices vacuum chamber tests cislunar space exhaust heat ISP orbital debris kinetic energy nuclear propulsion fear chemical rockets SpaceX Blue Origin NASA reference mission 100 hour test Guest Dr. Franklin Chang Diaz Dr. Erik Seedhouse Tagline Erik's new book, "To Mars & Beyond, FAST!, plasa propulsion, VASIMR View the discussion thread.