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I Wonder Why – Why The Moon Changes Shape?

Moon and it’s shape

I Wonder Why – Why The Moon Changes Shape? PR034 UNIV 21

Why does the Moon change shape?

● The Moon itself doesn’t change shape, it just appears to do so. It’s how much of

we can see that changes.

● The Moon is made mainly of rock and doesn’t produce any light itself. We only

see the Moon when the Sun is shining on it.

● The portion of the Moon that we see depends on its position relative to the Earth

and the Sun.

● The Moon orbits the Earth every 29.5 days. This is also the same amount of time


it takes the Moon to rotate once on its axis meaning that the same side of

the Moon always ends up facing us down on Earth.

● When the Moon is between the Earth and the Sun, the side facing us is

Predominantly dark and we can only see a small portion of it. As the Moon

continues its orbit and eventually reaches the opposite side of the Earth to where

the Sun is, the entire side of the Moon facing us becomes lit by the Sun and we

can now see a full Moon.