The Earth rotates on its axis (its poles) once in every 24 hours. This is the reason for day and night as the Sun illuminates only one hemisphere* of the Earth at a time.
Summer in the Southern Hemisphere (above)
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The Earth rotates on its axis (its poles) once in every 24 hours. This is the reason for day and night as the Sun illuminates only one hemisphere* of the Earth at a time.
Summer in the Southern Hemisphere (above)
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