Shadow direction of vernal equinox, autumnal equinox and summer solstice

At the vernal equinox, the sun shines directly at the equator and then moves north.

In summer solstice, the sun shines directly on the Tropic of Cancer, and then moves south. In autumn equinox, the sun shines directly on the equator, and then continues to move south.

The winter solstice sun shines directly on the tropic of Capricorn, and then moves north.

1, the flagpole is on the pole: the shadow of the flagpole is in the night hemisphere at the vernal equinox; The shadow of the flagpole faces south from summer to morning; The shadow of the flagpole at the autumn equinox is in the night hemisphere; There is no sunshine on the solstice in winter, so there is no shadow.

2. The flagpole is located in the polar circle, excluding the polar column: the shadow of the vernal equinox faces north; The shadow of the summer solstice faces north; The shadow of the autumnal equinox faces north; There is no sunshine on the solstice in winter, so there is no shadow.

3. The flagpole is located between the Tropic of Cancer and the polar circle: the vernal equinox faces north; The solstice in summer faces north; The autumnal equinox faces north; The solstice in winter faces north. This area faces north all the year round.

4. The flagpole is located on the tropic of cancer: the vernal equinox faces north; The summer solstice has no shadow; The autumnal equinox faces north; The solstice in winter faces north.

5. The flagpole is located between the equator and the Tropic of Cancer: the vernal equinox faces north; Between the vernal equinox and the summer solstice, the sun shines directly at the latitude of the flagpole once, and then begins to face south; The summer solstice faces south, and between the summer solstice and the autumnal equinox, the latitude of the direct sunlight flagpole never has a shadow, and then it begins to face north; The autumnal equinox faces north; The solstice in winter faces north.

6. The flagpole is located on the equator: the vernal equinox has no shadow; The summer solstice faces south; The autumnal equinox has no shadow; The solstice in winter faces north.

7. Take the northern hemisphere as an example, but the southern hemisphere is the opposite.