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The four primary moon phases are:

1. New Moon

2. First Quarter

3. Full Moon

4. Third Quarter (Last Quarter)

•The moon cycles through these four phases roughly every 7 days. The lunar cycle is just around 29 days, making it slightly shorter than a calendar month. So, it is possible to see two of the same phases in the same celandar month. This is where the phrase ‘once in a blue moon’ comes from. The ‘blue moon’ is when there are two full moons in a calendar month.

•There are also four secondary phases that occupy the space between the primary moon phases:

1. Waxing Crescent

2. Waxing Gibbous

3. Waning Gibbous

4. Waning Crescent

These names may feel arbitrary, so you should spend some time looking at the diagram at the top of the page to find patterns that help you remember their ordering. For example, the crescents occur only around the New Moon.

Also, knowing the direction of the sun and therefore the side of the moon is illuminated is very important

Explanation:

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