Do you need to measure horoscopes by looking at the sun?

The real solar day is divided into 24 apparent solar hours. 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. The real solar day is divided into 24 apparent solar hours. 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.

Difference between apparent solar time and local time

When calculating the horoscope, everyone has encountered this situation. Also at Beijing time 12, the sun in the northeast was not due south, but walked west for about an hour. In Tibet and other places, the sun only rose for a short time. If it is noon in both places, it will be unscientific. At noon, the sun should be due south.

The time we often use is clock time, which is Beijing time (Central Plains time). This is the average solar time in the artificially set standard time zone. When calculating the horoscope, if you were born at the beginning and end of a certain time, you will often make mistakes because of "depending on the sun time difference".

When measuring constellations, the time of birth should be astronomical time, not Beijing time (Central Plains time). Astronomical time has two meanings: local time and apparent solar time. The correct time of birth should be: firstly, according to the local longitude, the local time in conversion of time is changed to apparent solar time, and the revised time is the time to calculate the horoscope, that is, astronomical time. Generally, when we calculate the horoscope, we only need to calculate the cost and time of Beijing and the conversion of time.

Why should fortune-telling consider looking at the sun?

As we all know, there were no precise timekeeping instruments such as clocks and watches in ancient people's lives (although foreign watches were introduced from abroad in the Qing Dynasty, their circulation was very limited, and only a few qualified people such as emperors or dignitaries often used them on TV, and they were not used as official general timepieces). Their main timekeeping instruments are sundials, standard watches and missing prints.

The sundial and the chronograph are inseparable from the sun, and the time is determined according to the shadow of the sun. But what if there is no sun on a cloudy day or at night? You may have thought of it, use a leak! Usually, this is what the copper pot dripping refers to. The approximate method is to fill the pot with water, and use the principle of balanced water dripping to calculate the time by observing the data displayed on the carved arrow in the pot. This kind of timer is more common than sundials and watches. Obviously, both the sundial and the standard are related to the sun, and the leakage has nothing to do with the sun on the surface, but actually has an indirect relationship. Because determining the calibration accuracy of the notch itself, such as the missing arrow (like the pointer of a clock), it is inevitable to need a reference datum.

The best frame of reference is the sun. We believe that when these leaks are first made, we must constantly observe the shadow of the sun and calibrate it with the sundial and the time recorded by the standard meter before we can standardize the manufacture and production. Moreover, after a long period of use, the leaky kettle and leaky arrow will definitely wear out and cause deviation, and they need to be calibrated regularly according to the time recorded by timers such as sundials and standard watches. Therefore, the timing method of lettering also corresponds to solar time.

Is it necessary to count the horoscope as sun time?

The ancients did not have the problem of calibrating the time, because the locals determined the time according to the shadow of the sun seen by the locals. However, people in modern China are different. They are all based on the artificial time of Beijing time, that is, the time corresponding to the longitude of east longitude 120 degrees, that is, the time of the East Eighth District. As we all know, the closer we are to the east, the sooner we can see the sun. For example, Japan is the East Ninth District, and they will see the sun one hour earlier than Beijing.

For example, suppose the sun rises at 6 o'clock in the morning in Beijing, then the sun will definitely not come out in Lhasa, Tibet, and it will take about 1 16 minutes to see that the sun has just cleared up.

Why is this happening? When we study geography, we know that the longitude is 360 degrees (east longitude 180 degrees, west longitude 180 degrees). Every 15 degree, a time zone is divided into 24 time zones, and the sun rises and sets 24 hours a day, so 1 hour 60 minutes corresponds to a time zone, that is, 15 degree, so longitude 1 degree corresponds to 4 minutes.

Therefore, the correct time adjustment needs to consider the time difference of daylight saving time (if necessary), time zone time difference and daily time difference on the basis of Beijing time. The time after this adjustment is numerically called: apparent solar time. Eight-character fortune-telling must be calculated according to the apparent solar time.