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During the winter, the sun's rays hit the Earth at a shallow angle. These rays are more spread out, which minimizes the amount of energy that hits any given spot. Also, the long nights and short days prevent the Earth from warming up. Thus, we have winter!

On any given day, one of the earth's poles is farther away from the sun than the other for a longer percentage of the day. This is because the earth is tilted on its axis. And exposure to the sun brings heat. If the north pole is only closer to the sun than the south pole for a small percentage of the day, while the south pole is closer than the north pole for most of the day, then it is summer in the Southern Hemisphere and winter in the northern hemisphere. Because warm parts of the earth retain heat for some time even after losing the source of heat, and because cold parts of the earth remain cold when given a source of heat for an inadequate amount of time, daytime in the winter is still colder than nighttime in the summer. This principle also causes both summer and winter to last for over two months after their respective solstices.

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15y ago

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