A Secret of the Moon is a song by Hitomi. It occasionally features as an insert song in the Planetes anime.
Lyrics
When I wish upon the moon
Deepest dreams…
A spark of Love
Leaps in the Sky
Take me into your world
When I wish upon the moon
Dreams come true
I bless the day
You found me
I'll always stay with you
A secret of the moon
Let me be the sun that lights up your way
I live for you
I'll live for you
