When is the sun visible in the south in winter?

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In winter, the sun rises in a south-easterly direction and sets in a south-westerly direction; In summer, the sun rises and sets in a north-east and north-west direction, respectively.

Where the latitude is different, the degree of "tilting" of the sun's trajectory is also different. The two points where the celestial equator intersects the horizon are due east and west. As you can see, the sun rises in a north-east direction and sets in a north-west direction on the summer solstice.

On the summer solstice, when the sun is mid-heaven, that is, at noon local time, the sun is north-south of the zenith in the area south of the Tropic of Capricorn, and the sun is south-south of the zenith in the area north of the Tropic of Capricorn.

At the time of the spring and autumn equinoxes, the "trajectory" of the sun coincides with the celestial equator. In other words, only on the vernal and autumnal equinoxes of the year does the sun rise due east and set due west.

As you can see, for most of the year, the sun north of the Tropic of Cancer is in a southerly direction, which is the situation mentioned at the beginning of this article. But that doesn't mean that the sun north of the Tropic of Cancer won't appear in the northerly direction of the sky.

*Yes**. During the summer solstice, the sun rises from the northeast, while during the winter solstice, the sun rises from the southeast. This is due to the angle between the Earth's rotation orbit and the ecliptic plane, as well as the elliptical orbit of the Earth's revolution.

When the direct point of the sun shines directly in the northern hemisphere, the sun will rise from due east to north, that is, northeast, and set from due west to north, that is, northwest except in the polar day and night regions.

When the direct point of the sun shines directly in the southern hemisphere, except for the polar day and night regions, the sun will rise from due east to south, that is, southeast, and set from due west to south, that is, southwest.

The Sun at the South Pole of the Earth at noon is seen in the North. The North Pole and the South Pole rise from the east and then set from the west, the sun will never pass directly above the North and South poles, and the direct point of the sun will only move up and down between the south and north latitudes, and will never shine directly at places beyond the latitude, let alone the north and south poles. The polar day and night occur between the southern and northern latitudes, and there is a phenomenon of day and night alternation, but at the pole there are 6 months of night and 6 months of day every year.

Direct sunlight is based on the four seasons of the earth, and due to the rotation of the sun, different phenomena and influences will occur on the earth. So we usually say that direct sunlight is the main reason for the change of seasons. The direct sun begins to move northward at the equator in the Northern Hemisphere in March, at the Tropic of Cancer in the Northern Hemisphere in June, at the beginning of the equator south of the equapole in September, and at the Tropic of Capricorn in December.

The point of direct sunlight is moving westward every hour, moving 15 degrees of longitude per hour. In the calculation of geography problems, you can roughly take the latitude of daily movement.

At the vernal equinox, the direct point of the sun is at the equator, and then it moves north until June 22, the summer solstice, to the Tropic of Capricorn.

On the summer solstice, the direct point of the sun is on the Tropic of Capricorn, and then it moves south until September 23, the autumnal equinox, to the equator.

At the autumnal equinox, the direct point of the sun is at the equator, and then it continues to move south until December 22, the winter solstice, to the Tropic of Capricorn.

On the winter solstice, the direct point of the sun is at the Tropic of Capricorn, then it moves north, and returns to the equator on March 21, the vernal equinox. This cycle of regression movement is 365 days, 5 hours, 48 minutes and 46 seconds, which is also about a day, which is called a return year.

The Earth's orbit around the Sun is an ellipse that is not much different from its long and short diameters, and can be approximated as a perfect circle. The sun is at one of the focal points of this ellipse, and the focus is not in the center of the ellipse, so the distance between the earth and the sun is sometimes a little closer, sometimes a little farther away.

The closest point between the Earth and the Sun is called "perihelion", and perihelion is the beginning of January, when the Sun shines directly into the Southern Hemisphere, i.e., winter in the Northern Hemisphere and summer in the Southern Hemisphere.

In the same way, the farthest point of the Earth from the Sun is called the "aphelion", and the aphelion point is the beginning of July, when the Sun shines directly on the Northern Hemisphere, so the Northern Hemisphere is in summer, and the Southern Hemisphere is in winter.

In addition, because perihelion is closer to the Sun, the Sun's gravitational pull increases, and the Earth's rotation speed increases, and conversely, at aphelion, the speed slows down, so in the Northern Hemisphere, it seems that winter passes faster and summer is hotter longer.

In winter, the Earth is located at perihelion at the beginning of January.