Nasa has said it hopes to send astronauts on a ten-day trip around the Moon as soon as February.
The US space agency had previously committed to launching no later than the end of April but said it aims to bring the mission forward.
It's been 50 years since any country has flown a crewed lunar mission. Nasa will send four astronauts there and back to test systems.
The Artemis II mission is the second launch of the Artemis programme, whose aim is to land astronauts and eventually establish a long-term presence on the lunar surface.
Lakiesha Hawkins, Nasa's acting deputy associate administrator said it would be an important moment in the human exploration of space.
