Earth's single natural satellite, the Moon, is slightly larger than one quarter the size of the Earth. The Moon doesn't produce its own optical light, but shines by reflected light of the Sun.
PHOTO: Robert Gendler/NASA
Earth's single natural satellite, the Moon, is slightly larger than one quarter the size of the Earth. The Moon doesn't produce its own optical light, but shines by reflected light of the Sun.
PHOTO: Robert Gendler/NASA
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