Manx astronomer's view on today's planned launch
NASA's hoping to be able to launch its new Moon rocket today (3 September).
Technical difficulties meant it was postponed last weekend.
The vessel is just a demonstration and will be unmanned but it's the start of even bigger plans for space exploration.
It's hoped in the future more complex missions will see people live on the surface of the moon for weeks at a time.
Manx astronomer Howard Parkin has been telling Amy Griffiths more:
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