Summer happens in the hemisphere tilted towards the Sun, and winter happens in the hemisphere tilted away from the Sun.
Windows Original

During winter in the northern hemisphere, the Earth is tilted so that the Southern Hemisphere receives more sunlight. During summer in the Northern Hemisphere, the Northern Hemisphere gets more sunlight.
Windows Original

During winter in the northern hemisphere, the Earth is tilted so that the Southern Hemisphere receives more sunlight. During summer in the Northern Hemisphere, the Northern Hemisphere gets more sunlight.
Windows Original


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