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How much do you know about the moon?

The moon just before its new moon phase

Photo: Joseph Brimacombe/Flickr

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New moon

Barely visible in the night sky, the moon's first phase marks the beginning of the Chinese month. The first sight of the moon marks the beginning of the Muslim, Hebrew, Buddhist and Hindu months. A new moon is only completely invisible during an eclipse because the sun, moon and Earth must align in a very specific way to block out Earth's satellite completely. The photo shown here depicts the moon 32 hours before the technical new moon.