what do you mean by phases of moon? how are they caused?
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Answer:
The Moon orbits Earth at an average distance of 382,400 kilometers. The lunar month is the 29.53 days it takes to go from one new moon to the next. During the lunar month, the Moon goes through all its phases. ... The phases we see result from the angle the Moon makes with the Sun as viewed from Earth.
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The Moon orbits Earth at an average distance of 382,400 kilometers. The lunar month is the 29.53 days it takes to go from one new moon to the next. During the lunar month, the Moon goes through all its phases. The phases we see result from the angle the Moon makes with the Sun as viewed from Earth.
Full
The moon is said to be in full phase (and is known as a "full moon") when the illuminated half of the moon is fully in position for us to see it. This occurs during the time when the earth, moon and sun are located in a relatively straight line with the earth between the moon and the sun. The tilt of the earth allows the moon to be illuminated, and we see side of the moon that is fully in sunlight.
New
The "new moon" phase of the lunar cycle happens when the sun, moon and earth are located in a straight line, with the moon between the earth and the sun. The illuminated portion of the moon is facing away from us at this time with the shadowed half of the moon facing towards us, making it appear nearly or totally invisible.
Waxing
The moon is said to be in a "waxing" phase when it is moving from the new moon phase into the full moon phase. During this time, the amount of visible, illuminated moon will be gradually growing.
Waning
The moon is said to be in a "waning" phase when it is moving from the full moon phase into the new moon phase. During this time, the visible portion of the moon will appear to be shrinking.
Crescent
A crescent moon occurs close to the new and full moon stages, whether the moon is waxing or waning. At this time, only a small sliver of the illuminated moon is visible to us.