The Moon appears to change in shape depending on how much you can see (as long as it does not overlap!) And that depends on how much you see toward the Sun. Sunlight reflects the Moon which enables you to see it.
So, does the Moon change the situation?
Hang on! Does the Moon really change the situation? Of course, before we get into it we better know that the Moon itself is always exactly the same – it doesn’t shrink or get bigger as the moon moves – it’s just the amount you can see that change which is why the Moon seems to be changing shape.
How can I see the Moon?
You see, the Moon does not actually produce light at all. The Sun is a ball of flammable gas that provides a continuous source of light, drawing it away from all sides. Some of this light emanates from celestial bodies – moons, planets, asteroids, etc., meaning that the same light rises in our eyes so that we can see them. When you look at the Moon you see the light of the Sun that has shone on you, for you! I mean, that applies to everything: the screen you’re looking at now produces light but you rotate the device (tablet, phone, laptop, etc.) – can you see the background of it? Of course you can, but it doesn’t produce light like a screen. So, if you can see it, where does the light come from? That light, which shows the back of the metal in your eyes, allows you to see.
Yes, but why does the Moon change shape?
OK, OK, that’s why the Moon changes shape. there is the Moon, it looks like it is hanging high in the sky, but in reality, it is moving on the earth. Not only that, but the Earth revolves around it. Confusion? No? Phew! OK, on a clear night the value of the Moon you see depends on two things: when its interest is LUNAR (takes about a month… or “th-month”!) And where the Sun is related to the moon. You see, if the face of the Moon you see is facing the Sun (even though it is night time for us), then it is completely illuminated by the light of the Sun. IT’S a full moon.
To us, the Sun may have set, but remember, its light still shines on all sides and anything that falls on the Moon can be seen in your eyes. Now, as the Moon makes its orbit around the moon, the different faces of the Moon are illuminated by the Sun and, depending on where you are, you can see the whole illuminated side (Full Moon) or only part of the illuminated side (Crescent moon / Gibbous Moon, etc.). Golly, complex! Of course, some pictures really help to understand this. Therefore, let’s look at the different phases (or phases) of the Moon.