NASA astronauts are set to resume external upgrades to the International Space Station intended to prepare its U.S. segment for future commercial crew vehicle dockings.

Scientists expected the north polar region of Enceladus to be heavily cratered, based on low-resolution images from the Voyager mission, but the new high-resolution Cassini images show a landscape of stark contrasts.

NASA is weighing a robotic Mars-landing mission as early as 2026 to flight test critical technologies with subscale components in preparation for a human landing.

China’s human-spaceflight organization plans to launch the first element of its three-module space station in 2018.

After years of counting on U.S. government business, United Launch Alliance is paying more attention to developments in the global commercial satellite sector.

NASA is offering commercial startups initial no fee access to hundreds of its patented technologies as a means of creating greater access to new U. S. developed products and services.

Virgin Galactic confirms that it has reverted to an improved form of the original rubber-based fuel for powering the company’s sub-orbital SpaceShipTwo.

This week's round-up of stories you have may have missed, including new test flights for Sierra Nevada's Dream Chaser in 2016.