Is the perihelion of the earth's revolution the winter solstice or near it?

Perihelion is not in the winter solstice, but in 65438+1October 6-7, which is equivalent to the solar term of slight cold.

As for why it is a slight cold, it is just an objective fact. Landlords who fall on the winter solstice will have such problems, such as slight cold, severe cold, beginning of spring ... I'm afraid so. There will always be a few days, not for Yao's survival or for his death. I know there is a question in the landlord's heart, "Why is it winter when the earth is at the perihelion (solar terms are closer to the slight cold)?" If the landlord is in the southern hemisphere at this time,

In fact, the more important factor affecting the change of cold and heat distribution on the earth's surface is the movement of the direct point of the sun on the earth, which is mainly determined by the angle between the earth axis and the ecliptic plane. The temperature of the earth's surface has little to do with whether the earth is near or far from the sun (the hottest winter solstice in the southern hemisphere is a good explanation), but it has more to do with the angle of the sun. The snow on the flat ground doesn't melt as fast as the snow on the roof facing the sun. For example, all solar water heaters and solar photovoltaic power generation equipment are not installed parallel to the ground. The same is true (the tilt angle should be related to its latitude). The solar energy received by two flat plates with the same area is directly proportional to the sine value of their angle with sunlight. During the winter solstice, the sun shines more obliquely (at a small angle) in the northern hemisphere and more straightly (at a large angle) in the southern hemisphere, which makes the northern hemisphere colder than the southern hemisphere. or vice versa, Dallas to the auditorium

For us in the northern hemisphere, at the beginning of 1 month every year, the earth is closest to the sun in its orbit, which is called perihelion, and the linear speed and angular speed of the earth's revolution are faster; The days are short and the nights are long. At this time, the direct point of the sun is near the tropic of Capricorn.