Artemis II is in orbit - what happens next?

You could almost hear a sigh of relief from Nasa on Wednesday as its Artemis II rocket finally blasted off.

There's a lot riding on this mission - the safety of its four astronauts, Nasa's reputation, and the credibility of America's claim to be leading the new global space race.

There are mundane questions too: Could the onboard toilet break again? When can the crew nap?