Question : The moon moves around the earth in about ______.
Option 1: 30 days
Option 2: 24 days
Option 3: 27 days
Option 4: 29 days
Correct Answer: 27 days
Solution : The correct option is 27 days.
The moon takes approximately 27.3 days to complete its orbit around the Earth, known as its sidereal period . This means it takes around 27.3 days for the moon to return to the same position relative to the stars. The time it takes for the moon to return to the same phase (e.g., full moon to full moon) is slightly longer, about 29.5 days , due to the combined motions of both the Earth and the moon around the sun. This is called the synodic period and is responsible for the cycle of moon phases we observe.
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