Astronomer's are over the Moon with excitement as NASA's first crewed lunar mission in 50 years is only hours away from take off.

The launch window for Artemis II begins at around midday New Zealand time. 

It'll last about 10 days, with four astronauts circling the Moon, taking them further into space than ever before.

Astrobiology Network Executive Director Haritina Mogoșanu told Ryan Bridge NASA isn't in a rush to land on the Moon like it was with the Apollo missions.

She says the last moon landing was a military operation and during a space race.

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