As the shuttle had disconnected from the rocket, it try’s to use its last bit of fuel to get to to the surface of the moon. Progressively sparking to make it there.
When it reaches over the surface of the moon in struggle, it floats down.. Using all of its remaining energy to make it to the surface asap.
It has now landed on the moon, having no energy left.

The crew inside the shuttle are: Ralph, Sean, Mab, and Spookus.