Why is it daytime and night in the Antarctic and Arctic?

The saying that the Antarctic and the North Pole are half the day and the other year is night is not rigorous. But. There is also a certain truth in him.

For example, when the Sun reaches the Tropic of Capricorn, the North Pole reaches the Polar Day. That is, the entire Arctic is daytime around June 22, and the Antarctic is a polar night phenomenon after the implementation. As the sun moves south.

It's time for the Tropic of Capricorn. The Antarctic forms the polar day. That is, the daylight hours are very long, and at this time the polar night phenomenon is formed in the North Pole.

This is due to the angular tilt of the Earth's axis.

Theoretically, the South Pole and the North Pole have half a year of day and half a year of night. In areas south of the Antarctic Circle and north of the Arctic Circle, the sun does not set or rises for a day, which is the polar day and night phenomenon.

In the orbital motion of the earth, due to the existence of the yellow and red angles, the direct point of the sun does periodic reciprocating motion between the Tropic of Cancer on the earth's surface. In the Northern Hemisphere summer, polar days occur in the Arctic and polar nights occur in the Antarctic region. Polar nights occur in the Arctic in winter in the Northern Hemisphere, and polar days occur in the Antarctic.

South of the Antarctic Circle, there is a polar day on December 22, and the sun shines directly on the southern hemisphere, so the South Pole is daytime for half a year, at this time the sun obliquely hits the North Hemisphere, and the North Pole is a night for half a year, and the sun shines directly on the North Hemisphere on June 22, the North Pole is half a year of day, and the South Pole is half a year of night.

In this way, it is at the poles of the earth, and the sun cannot be found for half a year, so it will form natural astronomical phenomena such as polar day and night.

You find a basketball, rightly on the earth, draw the north and south poles, and use a flashlight to shine on one pole, and the other pole is naturally dark, because it can't be illuminated! Why is it alternating every six months? That's because the earth rotates.

It took half a year for the sun's irradiation point to shift from one pole to another.

Theoretically, except for the poles of the North and South Poles, there is a division of day and night everywhere else. Taking the North Pole as an example, when the sun begins to move northward from the equator, the area north of the Arctic Circle begins to gradually enter a state of long days and short nights, and the North Pole is the polar day. When the Sun moves to the Tropic of Capricorn, the entire Arctic Circle is polar daylight; When the sun then moves southward, the Arctic Circle is daytime! It is gradually shortened until the sun moves to the equator, and the day and night are of equal length.

When the sun begins to move south from the equator, the region north of the Arctic Circle begins to enter a state of short days and long nights, with the North Pole being the polar night; When the sun moves to the Tropic of Capricorn, it is polar night throughout the Arctic Circle; As the Sun then moves northward, the days within the Arctic Circle begin to lengthen until the Sun moves to the equator, where day and night are equal. Cycle. The Antarctic region is the opposite of the North Pole.

AnswerTheoretically, except for the poles of the North and South Poles, there is a difference between day and night everywhere else. Taking the North Pole as an example, when the sun begins to move northward from the equator, the area north of the Arctic Circle begins to gradually enter a state of long days and short nights, and the North Pole is the polar day. When the Sun moves to the Tropic of Capricorn, the entire Arctic Circle is polar daylight; When the sun then moves southward, the Arctic Circle is daytime! It is gradually shortened until the sun moves to the equator, and the day and night are of equal length.

When the sun begins to move south from the equator, the region north of the Arctic Circle begins to enter a state of short days and long nights, with the North Pole being the polar night; When the sun moves to the Tropic of Capricorn, it is polar night throughout the Arctic Circle; As the Sun then moves northward, the days within the Arctic Circle begin to lengthen until the Sun moves to the equator, where day and night are equal. Cycle. The Antarctic region is the opposite of the North Pole.

The main reason is that the South Pole and the North Pole are irradiated by the sun all the time according to the earth's rotation speed and the earth's rotation speed, and sometimes they are not illuminated by the sun at all.

The main reason is that the earth is constantly rotating, and when the rotation is at a certain angle, there will be a polar day or polar night.

This is because the Earth rotates along an inclined axis, so half of the year is in the polar day or night.

Why do the Antarctic and North Poles have polar day and night? This is due to the rotation of the earth. To be precise, it should be the existence of the yellow and red horns.

This question needs to involve the rotation of the earth and the revolution of the earth. The earth is an opaque sphere that does not emit light by itself, and the light comes from the sun, so the earth can only have half of the sphere with the sun at a time, and half of the sphere does not, which is day and night.

As for why there is a polar day and a polar night, this is due to the rotation of the earth. To be precise, it should be the existence of the yellow-red cross-horn, so what is the yellow-red cross-angle. It is the intersection angle of the ecliptic plane and the equatorial plane, the ecliptic plane is the axile plane of the earth revolving around the sun, the equatorial plane is the equatorial plane, the equator should know it, it is the largest circular plane perpendicular to the earth's axis, and the equator is the longest parallel.

Just look at the picture below.

Because of the existence of the yellow-red angle, the direct point of the sun can only return between the Tropic of Cancer and the Tropic of Cancer during the earth's rotation. The rotation of the earth causes changes in the length of day and night on the earth, which is simply the change of the direct point of the sun, which moves before the Tropic of Cancer, and can only illuminate half of the earth at a time, and the polar day and night of the north and south poles appear. Polar day in the Southern Hemisphere and polar night in the Northern Hemisphere, these two are exactly the opposite.

The direct point of the sun, the spring equinox on March 21 and the autumnal equinox on September 23, is directly on the equator, so the global day and night are equinox. At this time, there is no polar day and polar night. On June 22, the sun shines directly on the Tropic of Capricorn, and there is a polar day at the North Pole and a polar night at the South Pole.

Finally, on December 22, the winter solstice, the direct point of the sun is at the Tropic of Capricorn, and the polar day appears at the South Pole and the polar night appears at the North Pole.

Simple is like that, if you like it, pay attention to it, and if you don't understand geography, you can ask me at any time! The above are some of my personal suggestions and ideas, for reference only, I hope it can help you. If you have other ideas, you can comment at the bottom of the article.

Every year at the vernal equinox, the sun shines directly on the Earth's equator. Then the earth gradually moved, and in the summer, the sunlight came back to the northern hemisphere. Later, after the autumnal equinox, the sun will shine directly on the equator.

In winter, the sun shines directly over the Southern Hemisphere. During the summer months, the Arctic is exposed to sunlight all day long, and no matter how the Earth rotates, the North Pole does not enter the dark hemisphere of the Earth that is not exposed to sunlight, and the sun is seen hanging in the sky for months. It wasn't until after the autumnal equinox that the sun reached the southern hemisphere, and the North Pole entered the dark hemisphere of the earth, and the long night fell.

Throughout the winter, daylight does not reach the North Pole. Half a year later, it was not until the vernal equinox that the sun reappeared. So the Arctic half a year is day (from the spring equinox to the autumnal equinox) and the other half is night (from the autumnal equinox to the spring equinox).

In the same way, the Antarctic is also half a year of day and half a year of night, but the time and the North Pole are just the opposite. When the North Pole is daylight, the South Pole is night; When it's night at the Arctic, it's day at the South Pole.

The sunlight should not reach the north and south poles, so this happens.

This is due to the fact that the South Pole and the North Pole are at the poles, which leads to the phenomenon of polar day and night.

Due to the rotation of the Earth, the South Pole and the North Pole should receive different levels of sunlight, which is why polar day and night will occur.

This is the polar day and night phenomenon of the North and South Poles Polar day and night are unique natural phenomena in the polar circle, and the special natural phenomena of polar day and night are the result of the rotation of the earth along the inclined axis of the earth.

1. Because the earth's axis of rotation and orbit have an intersection angle, it is precisely because of this angle that the earth revolves around the sun and has four seasons of change. Half of the year, the sun shines directly on the Tropic of Capricorn, and the Antarctic Circle is daylight.

2. The earth is one of the eight planets in the solar system, the third bird in order from near to far from the sun, and it is also the terrestrial planet with the largest diameter, mass and density in the solar system.