CSIRO NASA Tracking Station Spokesperson Glen Nagle says the Artemis-1 moon rocket launch was cancelled with “good reason”.
The mission was called off under three hours before its scheduled launch after a fuel leak was discovered during tanking.
Mr Nagle said NASA wants to make sure “everything is absolutely perfect” to get a great mission to the moon.
“It’s the connection point between the fuelling lines and the actual rocket itself,” he told Sky News Australia.
“They detected a tiny leak and even a tiny leak is enough to get them worried.”