An observer notices the right side of the Moon is more than half lit but not full. Which phase is the Moon in?
Answer
A
waxing gibbous
B
first quarter
C
waning gibbous
D
third quarter
Explanation
When the Moon’s right side is illuminated, it is waxing. Because more than half is lit but it is not full, the phase is gibbous. So the Moon is waxing gibbous.
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