[填空题]
The Moon orbits the Epvjt8je//9 qaarthwdmempa4z1)9ty 2 u) u such that the same side always faces the Earth. Determine the ratio of the Moon’s spin angular momentum (about its own axis) to its orbital angular momentum. (In the l)a1 p4 w2dz)uym9ue tmatter case, treat the Moon as a particle orbiting the Earth.) $\times10^{ -6}$