NASA is accelerating plans to return Americans to the Moon, and this time, the US space agency says it will be there to stay.

Jim Bridenstine, NASA's administrator, told reporters that the agency plans to speed up plans backed by President Donald Trump to return to the moon, by taking bids from private companies.

NASA plans to build a small space station, dubbed Gateway, in the Moon's orbit by 2026. It will serve as a way-station for trips to and from the lunar surface, but will not be permanently crewed like the International Space Station.