It's too cold. What is the reason?

The rotation axis of the earth forms an angle with the orbit of revolution.

In winter, the sun shines directly in the southern hemisphere. We are far away from the sun in the northern hemisphere, so it is cold.

In summer, the sun shines directly in the northern hemisphere, so it feels very hot. These two areas are called temperate zones.

The equator is tropical, because it has been exposed to direct sunlight, so there is no clear division of the four seasons.

The specific latitude division forgets the most basic knowledge of middle school geography. But in liberal arts, it happened that I was studying science.

Four seasons; throughout the year

When the earth rotates, the axis is inclined and the spatial orientation remains unchanged. In this way, the earth is not completely irradiated by the sun at different positions in its orbit, forming four seasons: spring, summer, autumn and winter.

On March 2 1 or so, the sun shines directly on the equator, which is called the vernal equinox. Spring in the northern hemisphere is in March, April and May around the vernal equinox.

Around June 22nd, the sun shines directly on the Tropic of Cancer, which is the so-called summer solstice. Summer to June, July and August is the summer in the northern hemisphere.

Around September 23, the sun went straight to the equator. This day is called the vernal equinox. September, 10, 1 1 spring equinox is autumn in the northern hemisphere.

12 Around February 22nd, the sun shines directly on the Tropic of Capricorn, which is called the winter solstice. The winter months around the winter solstice are 12, 1 and 2.