Before I answer your question, Leslie, I must correct you. No question that you might ask is "stupid." One cannot acquire skill or knowledge without asking questions. It is only a fool who goes about mindlessly, or hoping that others might not notice their ignorance.

You do well to ask questions and I encourage you to ask as many as you must to acquire all the knowledge that you might need!

[What a shame it is that such a bright young girl would think anything different, but Ozymandias is glad to at least clarify that.]

The moons and the Sisters are likely one and the same. That is why I said they are not only referring to the moons above. The Sisters are the moons, but they are more than just the moons as well.