jjh13
jjh13 jjh13
  • 19-09-2016
  • Biology
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what causes the lunar phases that we see from earth?

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TheFhannyBear TheFhannyBear
  • 19-09-2016
As it moves around the Earth, the side we can see gradually becomes more illuminated by direct sunlight. After a week, the moon is 90 degrees away from the sun in the sky and is half illuminated, what we call "first quarter" because it is about a quarter of the way around the Earth.
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