the month of one complete orbit: the period of time it takes for the moon to return to the same position against the background stars, or to complete one full 360&#176; orbit around the earth.
(it; takes; for the moon to return to the same position against the background stars, or to complete; T:the period of time) (the moon; to return; to the same position against the background stars)
it the moon
takes to return
for the moon to return to the same position against the background stars, or to complete T:the period of time
to the same position against the background stars