[填空题]
The Moon orbits the Earth sucw)zewp+ o6(a ;*kcyfvxwtr 0+s g3n .f 5yh2joh. kyhzy 5-iqx5 9hz +ei+*gko 1jd.fjt 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 latter case, treat the Moon as a par+ ig-jo5yi kth x.e1+5jh.9kqd*zf zyticle orbiting the Earth.) $\times10^{ -6}$