The moon takes about 28
days to orbit the entire planet of earth. The position of the earth, sun
or moon affects the phases of the moon and which part of the moon we can
This free online moon
phases calendar and calculator will identify, in real time, how the moon
is seen here on Earth. The image above in our moon phases calendar will
show you exactly what part of the Moon can be seen right now, if at all.
The moon phases calendar
is divided into 4 parts: new moon (where you see no moon at all), first
quarter (only half of the moon can be seen), third quarter (only half of
the moon can be seen), and full moon (the entire moon can be seen).
Our free online moon
phases calendar will help clarify your understanding of how we see the
moon whilst the video (above right) explains the process in more detail
and the image below shows the phases of the moon in relation to the
earth and sun.