Why is the summer solstice perihelion and the winter solstice perihelion?

This is because around the summer solstice, the earth is near the perihelion, while around the winter solstice, the earth is near the perihelion.

However, it is not accurate to say that summer solstice is apohelion and winter solstice is perihelion.

Like every planet in the solar system, the earth revolves around the sun along its own elliptical orbit. Therefore, there is a point in the farthest orbit from the sun, which is called the "apohelion" of the earth; There is also a point closest to the sun, called the "perihelion" of the earth.

The earth is too far away from the summer solstice, usually in early July; The winter solstice after perihelion usually begins at 1

Therefore, the statement that summer solstice is perihelion and winter solstice is perihelion is just an approximate date coincidence.

Perihelion is faster than perihelion.

When the orbit of the celestial body is elliptical, the celestial body has only one apohelion.

When the orbit of the celestial body is hyperbolic or parabolic, there is no apohelion.

Perihelion time on the earth: At the beginning of July, the earth is farthest from the sun, which is 152, 100000 km. At apohelion, the revolution speed of the earth is very slow. It is summer in the northern hemisphere and winter in the southern hemisphere.