Launch costs were high and minimizing mass sent to space was the main driver for mission design. To reduce mass, mission designs employed nuclear thermal propulsion (NTP), in-situ resource utilization ...

Who's up for a rocket launch with a sonic boom? A spacecraft on an International Space Station resupply mission should be visible after liftoff.

North Korea fires solid rocket motor. North Korea said Tuesday it had conducted the final ground test of a solid-fuel rocket ...