An unidentified astronaut aboard the International Space Station had a deep vein thrombosis — or blood clot — in the jugular vein of their neck, according to a new case study.

The launch will be the third ever for the Long March 5, and the first since a July 2017 liftoff ended in failure.

President Trump has signed the 2020 National Defense Authorization Act and with it directed the establishment of the U.S. Space Force as the sixth branch of the armed forces.

China’s farside rover, Yutu 2, has broken the longevity record for working on the surface of the moon.

The moon's farside is an attention grabber for many reasons. A new mission idea capitalizes on those reasons in a project dubbed FARSIDE.

China's giant, alien-hunting radio telescope is finishing its testing-and-commissioning phase, which has occurred over the past three years.

A recent test of the ion engine that powers Japan's Hayabusa2 spacecraft went well, clearing the hardware for full-on operations soon, mission team members announced late last week.

Is 2020 the celestial payoff year, in which astronomers finally confirm a "technosignature" coming from an advanced alien civilization?

A NASA spacecraft circling the moon has spotted the scar left by a Chinese satellite's impact.

These strange features on the moon are associated with magnetic anomalies and may therefore help shield astronauts from radiation, some researchers say.

China just tested out its brand-new facility for simulating Mars landings, marking a big step in the nation's planned march to the Red Planet.

Explorers and tourists on the moon will have to deal with lunar dust, which is abrasive and pervasive.

A NASA official discusses how the agency plans to pull off the ambitious landing plan.

Aliens of all stripes are zeroing in on the secretive Area 51 this weekend.

NASA’s Lunar Reconnaissance Orbiter (LRO) has reportedly failed to spot India’s Chandrayaan-2 lunar lander, which apparently crashed during its Sept. 6 touchdown attempt.

The United States Air Force Space Command began conducting the 13th Schriever Wargame at Maxwell Air Force Base in Alabama yesterday (Sept. 4).

India's Chandrayaan-2 spacecraft at the moon successfully completed its fifth and final lunar orbit maneuver today (Sept. 1), setting the stage for the release of the country's first lunar lander.

The protection of trade routes and lines of communication are traditional military responsibilities, and this will continue to be true as cislunar space becomes "high ground."

The mission, which is scheduled to launch in July 2020, has suffered failures in two recent parachute tests.

China's tiny lunar orbiter Longjiang-2, also known as DSLWP-B, crashed intentionally into the moon's far side on July 31, according to media reports.

Colonists could avoid the harsh environment of the lunar surface by living in subterranean lava tubes. But researchers first need to learn more about these curious structures.

Now you can see what Neil Armstrong saw as he landed the Apollo 11 lunar module, known as the Eagle, on the surface of the moon on July 20, 1969.

The secretive mission of the U.S. Air Force X-37B mini-space plane has winged past 670 days of flight – just 48 days shy from setting a long duration record for the program.