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new moon vs. full moon

new moon vs. full moon: What's the difference?

New moon and full moon refer to phases of the moon. When the moon is a new moon, it’s mostly or totally dark because it is in the shadow of the sun as viewed from the earth. When the moon is a full moon, the whole face of the moon is visible because it is lit up by the sun, which is opposite the moon in relation to the earth.

noun

  • new moons
    plural
  1. the moon either when in conjunction with the sun or soon after, being either invisible or visible only as a slender crescent.

  2. the phase of the moon at this time.

noun

  • full moons
    plural
  1. the moon when the whole of its disk is illuminated, occurring when in opposition to the sun.

  2. the phase of the moon at this time.