Observers on the tropic of Capricorn see which day is which solar term when the sun is just at the zenith.

Observers on the tropic of Capricorn see that the day when the sun is just at the zenith is the winter solstice.

The winter solstice is 65438+February 22nd, when the direct point of the sun moves to the Tropic of Capricorn, so the observer standing on the Tropic of Capricorn can just see the zenith sun.

Here is the movement law of the direct point of the sun:

The direct point of the sun moves westward every hour, passing through longitude 15 degrees every hour. In the calculation of geographical problems, we can roughly take the latitude of 0.25 degrees per minute.

At the vernal equinox, the direct point of the sun is on the equator, and then it moves northward until it reaches the Tropic of Cancer on June 22nd (that is, the summer solstice). ? On the summer solstice, the direct point of the sun is on the tropic of cancer, and then it moves south until it reaches the equator on September 23 (autumnal equinox).

At the autumnal equinox, the direct point of the sun is at the equator, and then it continues to move southward until it reaches the tropic of Capricorn (that is, the winter solstice) on February 22, 65438. On the solstice in winter, the direct point of the sun is on the tropic of cancer, then it moves northward and returns to the equator on March 2 1 day (that is, the vernal equinox). The cycle of this repeated regression movement is 365 days, 5: 48: 46, that is, about 365.2422 days, which is called the tropic of cancer.

For the above information, please refer to Baidu Encyclopedia-Direct Sun Point.