Magnetoplasma propulsion
There is a newer rocket technology developed by NASA and AdAstra which would reduce the orbital transfer time from Earth to Mars down to about 40 days, significantly less than 6 months. It is called VASIMR, Variable Specific Impulse Magnetoplasma Rocket. Can't understand why we haven't heard much about employing this sort of propulsion yet.
Biting the hand that feeds IT
