[填空题]
The Moon orbits the Earth s 0y j5-m(m 4bpf+5ovu3:vmpr9 igeoh such that the same s xwuee9hx/vv5: 0f/p)dinaill2 ugm5*o52x 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 thehswoillv5)gpan2ux/:5 *95 0mxude/v2f x ie latter case, treat the Moon as a particle orbiting the Earth.) $\times10^{ -6}$