Question

Why does moon changes its shape every day

Answer 1

Changing shape of the moon, also called phases of the moon is caused by changes in the part of the moon illuminated by the sun facing the moon.

We see moon because of the sunlight reflected by towards the earth. At any time the sun is able to illuminate only half part of the moon. The other half of the moon does not receive any sunlight because of its spherical shape. Depending on the relative positions of sun, moon, and the earth, different proportions of the semi-sphere-shaped illuminated half of the moon faces the earth, causing the shape of the moon visible from the earth to change.

On a full moon day, when the moon appears as a complete circle, the earth is positioned directly between the moon and the sun. Because of this the illuminated surface of the moon fully faces the earth, making the moon appear round. At other the earth is positioned away from the direct connecting sun and moon. Further the earth from this line, smaller is the illuminated part of the moon directed towards, and visible from earth. On a new moon day the earth is positioned farthest from this line joining sun and moon. AS a result the moon is seen as a thin crescent only.

Answer 2

Answer:

• The Moon does not emit( give off) light itself, the' moonlight' we see is actually the Sun's light reflected off the lunar face.
• So, as the Moon orbits the Earth, the Sun lights up different corridors of it, making it feel as if the Moon is changing shape.
• Because the moon revolves around the earth, its form varies on a diurnal base, and we only see the part of the moon from which the sun’s light is reflected towards us.
• We see only that part of the moon from which the light of the sun is reflected towards us. Hence the moon changes its shape daily.

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