China's reusable Shenlong space plane launched on its fourth space mission earlier this month. What is it doing in Earth orbit, and how do those activities advance China's space goals?

The Dream Chaser space plane, a collaborative project between NASA and Sierra Nevada Corporation, marks a new chapter in space exploration. Designed to transport cargo and crew to low Earth orbit, the ...

X-37B spaceplane is secretive and operates in orbit for research and testing, competing with China. Spaceplanes operate in space and air, land accurately on runways, but need a rocket launch.