What does it mean to look at the sun?

Apparent solar time, mbth: Apparent solar time, divided into 24 apparent solar time. This time system is called apparent solar time. Apparent solar time is also called apparent solar time. Apparent solar time is the hour angle of the center of the true sun's apparent circle plus 12 hour.

Namely: apparent solar time = average solar time+true average solar time difference. When the meridian of the direct sunlight time zone is 12. Every time the earth rotates 1 degree, the time increases by 4 minutes.

(1) Central Time Zone: East longitude 120 degrees is the central meridian.

(2) Longshu time zone: East longitude 105 degrees as the central meridian.

(3) New Tibet time zone: 90 degrees east longitude is the central meridian.

(4) Kunlun time zone: 82.5 degrees east longitude is the central meridian.

(5) Changbai time zone: the central meridian is east longitude 127.5 degrees.

Related instructions

First of all, it is certain that the apparent solar time is a time relative to the sun, which is calculated according to the relative position of the sun and the earth, but it is different from the Beijing time isochronal solar time, because it is not the standard time defined by the state, but the real relative time.

Of course, the so-called "truth" does not mean that the time of the sun is true or false, but that this time is really calculated according to the trajectory of celestial bodies and accurately acts on the human body.

Because when the earth revolves around the sun, it is not an absolute circle, but an ellipse, which we ignore in our daily life considering convenience. Usually, the earth is imaginary to form a "circle around the sun" to create a convenient daily life. This time is not the real time called mean solar time, so it is not accurate to use it to tell fortune, but to be more accurate, we have to restore it to that solar time.

Therefore, we might as well describe the concept of viewing the sun as follows: it is the running time corresponding to a real celestial body in the universe, and in layman's terms, it is the time corresponding to the local relative position of the earth and the sun, which was used by the ancients to tell people fortune.

In addition, there is another point that needs to be reminded: the apparent solar time disk arrangement we use today is actually universal not only in China, but also all over the world; This is a time that needs accurate calculation. It is calculated according to latitude and longitude, so the time difference between the Central Plains and other places has been taken into account, the principle of conversion method has not changed, and the derivation formula has no geographical distinction.

Refer to the above content: Baidu Encyclopedia-Seeing the Sun Time