As NASA charts a course to Mars for human explorers with ever more capable hardware and software systems, policymakers, mission managers and those who launch face some tough ethical issues.

The rocket engine battle between the 500,000-lb.-thrust class Aerojet Rocketdyne AR1 and Blue Origin BE-4 is heating up.

Reaction Engines has begun construction of a test facility where it plans to perform the first ground-based demonstration of its Synergetic Air-Breathing Rocket Engine.

Exploration Mission-1, NASA’s planned first flight of its heavy-lift Space Launch System and Orion deep-space crew capsule, won’t make its target launch date of November 2018.

NASA’s Inspector General has found the agency lagging in efforts to develop a new spacesuit for future human deep-space missions.

The president's remarks came as he congratulated International Space Station commander Peggy Whitson for breaking the record for time spent orbiting Earth.

Chinese engineers declared the launch of their nation’s first space freighter a success on April 20.

Chinese human-spaceflight managers are ready to launch their nation’s long-awaited robotic cargo vehicle to the Tiangong-2 orbital outpost.