New Moon

What phase is 1?

Waning Crescent

What phase is 2?

3rd Quarter

What phase is 3?

Waning Gibbous

What phase is 4?

Full Moon

What phase is 5?

Waxing Gibbous

What phase is 6?

1st Quarter

What phase is 7?

Waxing Crescent

What phase is 8?

Why do we see phases of the moon?

The shape of the moon depends on how much of the moon's illuminated side is visible from Earth. These shape changes are called phases. We see phases because the moon orbits the Earth.

What is a new moon?

When we see the dark side, it is called a new moon.

Why do we never see the far side of the moon?

The Moon rotates at about the same rate that it take for it to make one revolution around the Earth. It takes the moon 27.3 days to orbit the Earth once and 29.5 days to go through all its phases, new moon to new moon.

When do we see a new moon?

When the moon passes between the sun and Earth, we can only see darkness. The illuminated side is towards the sun and the dark side is towards the Earth.

What is a full moon?

When we see the full illuminated side, it is called a full moon

Waning phases

when the lit up side of the moon appears to be getting smaller until a new moon occurs.

Waxing phases

when the lit up side of the moon appears to be getting larger until a full moon occurs.

Sidereal month

time it takes the moon to orbit the Earth once
27.3 days

Synodic month

time it takes the moon to go through its phases; from one new moon to the next
29.5 days

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