For years, researchers have wondered what energy source allows the solar wind − a projection of charged particles from the Sun − to rush by at hundreds of miles a second.

Nasa’s decision to prioritise the safety of the astronauts, and to work with another commercial partner in finding a solution, is a triumph of wisdom and caution.

The SpaceX-backed mission has no professional astronauts aboard.

The Polaris Dawn mission will test communications, perform research and conduct a spacewalk with SpaceX extravehicular spacesuits.

The Polaris Dawn mission will test communications, perform research and conduct a spacewalk with SpaceX extravehicular spacesuits.

The new study seems to confirm that molten magma covered the Moon’s surface shortly after its formation.

The space missions of the future will need to coordinate multiple satellites and spacecraft − and figure out how to refuel, repair and even replace them in orbit.

The manoeuvres will set up an encounter with Jupiter in 2031.

Space may be considered the final frontier, but the US was once a frontier, too. How can space industry leaders avoid repeating practices that led to colonialism in the 18th century and beyond?

Butch Wilmore and Suni Williams were supposed to stay around eight days on the space station.