WHY DO WE ALWAYS see the same face of the moon? It’s unusual in that its rotational speed is identical to its orbital speed, which it always presents the same side towards us. It both turns around its axis and around the Earth once every 27.32166 days.
Here are the phases of the moon, with their correct terminology:
New
Crescent waxing
Half moon waxing
Gibbous waxing
Full
Gibbous waning
Half moon waning
Crescent waning
