Why are summers in the northern hemisphere longer but cooler than in the southern hemisphere?

The Earth revolves around the Sun (orbital motion) in an almost circular orbit, passing it in a year. Moreover, in January it turns out to be somewhat closer to the Sun (147 million km) than in July (152 million km). Changing the distance to the Sun affects the speed of the Earth’s rotation: the farther from the Sun, the lower the speed. Therefore, in the northern hemisphere, summer is longer than winter, and in the southern hemisphere, summer is shorter.

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