One of the different shapes of the moon as seen from Earth.
The partial or total blocking of one object by another.
The blocking of sunlight to Earth that occurs when the moon is between the sun and Earth.
The darkest part of a shadow.
The part of a shadow surrounding the darkest part.
The blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon.
The rise and fall of the level of water in the ocean.
A device built to study distant objects by making them appear closer.
A round pit on the moon's surface.
Dark, flat regions on the moon's surface.