Orbital dynamics show that President Trump’s pledge to land astronauts on Mars couldn’t happen until 2029 at the earliest.

Wearing the wrong shoe on Earth can lead to injury. Researchers still need to figure out the physical consequences of spending a long time walking around on the Moon.

NASA's two stuck astronauts are taking their first spacewalk together, exiting the International Space Station almost eight months after moving in.

Directed by Cristina Costantini, the film features archival footage of the late astronaut and interviews with her family and colleagues, as well as narration by her partner of 27 years, Tam ...