What solar terms and direct points of the sun are produced by the earth's rotation?

1, the direct point is in the southern hemisphere. Move north.

2. The greater the declination angle, the greater the range of direct sunlight. On the contrary, it will become smaller.

3. vernal equinox and autumnal equinox

4, summer solstice, winter solstice

5. Move between the Tropic of Capricorn and the Tropic of Cancer. For example, in the northern hemisphere, after the summer solstice, the point moves south, and after the winter solstice, the point moves north.

The linear velocity at 6.60 latitude is less than that at the equator.

7、? I don't know what that means.