when Luna said that, it means Estrelle have to find out by herself or just wait until Luna gets the mood to tell her all about Ra.
but few days later, the Moon not as bright as some days before. she is covered by the shadow of the fog. Estrelle ask her though, "okay, what is wrong now?"
Luna : "Nothing."
Estrelle : "you know I know you that well, so don't lie to me. tell me. the shadow is not supposed to be there, right Luna? you ask the shadow to cover your sad face"
Luna just smile at her, sad smile, and say "in time you will know my dear"
Few years later, the Moon looks so nervous. no one noticed, but as her very bestfriend, the Star knows about it.
Estrelle : "as years passed by, would you tell me about your feeling this time? you look so nervous. I just feel it"
Luna : "yes my dear, you are right. this is the perfect moment for you to know. No I won't tell you, you could just see it by yourself" and as usual share her best smile.
and that day the eclipse occurs. the Moon and the Sun looks great together.
Moon doesn't have its own shine. Sun gives her his shine.
It took some time for Moon to meet the Sun, and she is patient enough to wait an Eclipse.
PS :
God will make a way, where there seems to be no way - Don Moen
Cheers,
-lune-