[填空题]
The Moon orbits the Eartm +j,+ nsz6ypqh such -k57fpx4 tdrcthat 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 latter case, f7 kx5r 4-tcdptreat the Moon as a particle orbiting the Earth.) $\times10^{ -6}$