Artemis II mission was due to begin as early as next week and astronauts have spent almost two weeks in quarantine Artemis II mission was due to begin as early as next week and astronauts have spent almost two weeks in quarantine Nasa has postponed its historic mission to send astronauts around the moon and back again, after issues arose during a critical test of its most powerful rocket yet. The US space agency had planned to launch the Artemis II mission from Kennedy Space Center in Florida