On the question of the time zone of the earth, the time zone relationship between the sun and the ea

1. Because when the sun is seen in the 12th East Zone, it will take 12 hours for the middle time zone in the west (such as London) to see the sun, and 24 hours for the 12th West Zone to see the sun. So a whole day difference (24 hours). This is to make it easier for the whole world to be able to know the time elsewhere.

Just like now at half past ten at night, we are in the East 8th District, and New York is in the West 5th District, 8+5=13, then now New York is half past nine in the daytime.

2, of course, the East 12th District sees the sun first. Because it has been internationally defined, although the sun was also seen in the West 12th District, it was still located "yesterday", so the answer is the East 12th District.

3. We define it this way to better distinguish between different places of time. Just like the sun, if we call everything we see when we look up as the "sun", the moon is also called the "sun", and the stars are also called "sun", then it is difficult to study which celestial body moves and how it moves, because there are so many "suns" that it is easy to get confused! So we divide time zones.

And then you put it in parentheses: So you think so. Suppose the earth is stationary at first, and it is just morning in the East 12th Zone, and the sun has just been seen, okay, now the Earth is starting to turn from west to east, and then it is going to the East 11th Zone, and then the East 10th Zone, the East 9th Zone, the East 8th Zone, and ......East Zone 1, Central Time Zone, West Zone 1, West Zone 2 ......West 12th District!

The 12th West District was twenty-four hours late to see the sun, wasn't it?

It's all artificial, i.e. the international date line is the beginning of the day. So the East 12th District sees the sun first.

Since you admit that the earth is round, it is not difficult to understand this. It's all artificial. At the same time, although the sun had already shone on the West 12th District when it ushered in a new day in the East 12th District, for the East 12th District, it was already the day before.

Just imagine, if there is no artificial international date line, different regions of the earth will either never change the date, or nothing to follow, wouldn't it be chaotic to death.

Earth in the Universe – Local Time, Time Zone, and Zone Time Calculation.

The time zone relationship between the Sun and the Earth is that the time it takes for the Earth to revolve around the Sun is one year (days).

The Earth's revolution around the Sun refers to the periodic rotation of the Earth around the Sun. The orbit is an ellipse that is very close to a perfect circle, with an average angular velocity of 360 degrees per year and a flat velocity of 940,000,000 kilometers per year.

The Sun and the Earth

The average distance between the Earth and the Sun is about 100 million kilometers, which is already very impressive compared to the Earth with a diameter of less than 10,000 kilometers, and even if light can travel 300,000 kilometers per second, it takes more than 8 minutes to travel from the Earth to the Sun.

It takes a year for the Earth to revolve around the Sun, so if you know how long the Earth is around the Sun, you can calculate how fast the Earth revolves around the Sun, which is about 30 kilometers per second.

The sidereal cycle of the Earth's revolution is called the sidereal year. This unit of collapse is obtained by using the star as a reference point. During a sidereal year, the center of the Earth, as seen from the center of the Sun, orbits the Sun from a point in the background of the star, and then returns to the same point in the sky.

Overview of time zones.

The earth always rotates from west to east, and the east always sees the sun before the west, and the time in the east is always earlier than the west. The difference between the east and west moments is not only measured in hours, but also in minutes and seconds, which brings many inconveniences to people's daily life and work.

In order to overcome the confusion of time, an international conference on the J-Degrees held in Washington, D.C., in 1884, stipulated that the world should be divided into 24 time zones. They are the middle time zone (zero time zone), East 1-12 zones, and West 1-12 zones. Each time zone spans 15 degrees of longitude and the time is exactly 1 hour.

Finally, the 12th East and West Districts each span longitude degrees, bounded by 180 degrees east and west longitude. The time on the **meridian of each time zone is the time uniformly adopted in this time zone, which is called zone time. There is a 1-hour difference in time between two adjacent time zones.

For example, the time in the East 8 Zone of China is always 1 hour ahead of the time in the East 7 Zone of Thailand, and 1 hour behind the time in the East 9 Zone of Japan. Therefore, people who travel abroad must adjust their watches at all times to match the local time. Whenever you go west, you must move your watch forward by 1 hour for each time zone you pass (e.g. from 2 o'clock to 1 o'clock); Whenever you go east, you have to set your watch back by 1 hour (e.g. 1 o'clock to 2 o'clock) for each time zone you pass.

In fact, many countries and regions in the world do not strictly calculate time by time zone. In order to adopt a uniform time nationwide, the time in a certain time zone is generally used as the time of national uniformity. For example, China regards the time in the East 8 District, where the capital Beijing is located, as the unified time of the whole country, which is called Beijing time.

For example, countries such as the United Kingdom, France, the Netherlands, and Belgium, although they are located in the middle time zone, use the time in Zone 1 East in order to match the time of most countries in Europe.

Thoughts on jet lag:

1.Where does jet lag come from?

There is no uniform conversion method for time usage in various countries, which causes inconvenience to transportation and communication. For the sake of unification, the world adopted and followed the system of time difference, and the time calendars of all countries were based on this system.

2.Why 24 time zones?

I cope with 24 hours a day. That is, it meets the 24-hour return to the original point, and the 24-hour time zone covers the whole world.

3.Why is there a zero time zone?

It is explained by the principle of coordinate axes, which is convenient for the calculation of time difference by adding and subtracting the law.

4.Why are East 12 and West 12 only half the size of other time zones?

To meet the existence of 24 time zones and zero time zones.

5.Time calculation in different time zones?

The same subtraction is different, and the east is added and the west is subtracted.

"Same" means that if they are in the same eastern time zone or in the same western time zone, then the two time zones are subtracted, (e.g. if East 8 and East 5 are both in the eastern time zone, then 8 5 3.) "Different" is the opposite.

Following a map of the world centered with a zero time zone in the middle, the time zone sought is east of the known time zone, plus the time in the known time zone. Otherwise, it is minus.

In order to unify time, the international method of dividing a time zone every 15° longitude is adopted, and the world is divided into 24 time zones. Among them, the time zone with 0° meridian as the ** meridian is the middle time zone (also known as the zero time zone), the east to 180° is the east 1 to the east 12 district, the west to 180 ° is the west 1 to the west 12 district, and the east 12 and west 12 districts each span longitude, all of which are half-time zones.

As the Earth rotates from west to east, from time zero to east, the time increases by 1 hour for each additional time zone, and decreases by 1 hour for each additional time zone to the west. The West 12th District has 24 hours less time than the East 12th District.

As shown in the figure, each time zone is 15°, the middle time zone is centered on the 0° meridian, and the left and right, from the east and west meridians to the east and west are 15° respectively, which is the east (west) zone 1 and the east (west) zone 2. East (West) 11 districts, the rest, also 15°, this is (East-West) 12 districts.

The prime meridian is based on the location of the Greenwich Observatory in London, and it is set as the zero time zone. + time zone to the east and - time zone to the west.

It is a time zone every 15°.