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The First Quarter appears at approximately seven days after the New Moon.

At New Moon ; The Earth, Moon, and Sun are in a straight line in that order. Sometimes you see a Solar Eclipse, but other wise the Sun is too bright to see the Moon's sillouette against the Sun.

After seven days, the Moon is at half of its distance between New Moon and Full Moon. So we see only Half The Moon.

The fact that its named the First Quarter suggests a misunderstanding. The word Quarter means it has travelled one quarter of its orbit between New Moon and the next New Moon, but it has travelled half of its orbit

between New Moon and Full Moon.

In orbiting between Full Moon to the next New Moon, it travels the same distance on the other half of its orbit, and you see the LAST Quarter Moon.

Try an experiment. In a darkened room, have a pin-point light(Sun) and shine it on a ball. Between you , the ball, and the light is the New Moon. Now turn yourself and the ball 90 degrees (right angle) and you will see half the ball, the other half is in darkness (first quarter). Turn a full 180 degrees from the pin-point light (your back to the light),and you see the ball fully lit(Full Moon). Turn a further 90 degrees (270 degrees) and you will see the other half of the ball (Last Quarter), and finally back to the next New Moon.

Hope that helps!!!!

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lenpollock

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Q: Why does the first quarter moon appear?
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