A constellation _ How many constellations are there?

How to calculate a person's horoscope?

1. A person's so-called "constellation" originated n years ago. Generally speaking, it's all about the sun constellation-that is, the position of the sun on the celestial sphere when a person is born (finally, the moon constellation is discussed).

The sun's orbit is the ecliptic. Many people will say the zodiac 12 constellation, but this is actually a mistake. There are 13 constellations that the ecliptic passes through. In addition to what is usually said, there is Ophiuchus, which lies between Scorpio and Sagittarius. If you can get the map, you can easily find it.

3. The sun runs on the ecliptic, moving less than 1 from west to east every day (the ecliptic is 360). These constellations on the ecliptic are long or short-Virgo accounts for about 44, and poor Scorpio is less than10-and the time required for the sun to pass through each constellation is long or short. This is inconvenient to calculate the date according to the position of the sun. This introduces the concept of the zodiac.

4. It is generally believed that in ancient Babylon and Greece, astronomers decided to divide the ecliptic into 12 segments, each of which is 30, in order to show the movement and position of the sun on the ecliptic. After long-term practice, this means that the sun moves and stays in a palace every month. In this way, in the 12 months of a year, the sun passes through the 12 house in turn, with a total of 360 degrees, that is, a circle on Sunday, and the next year starts from the vernal equinox and repeats itself.

5. The zodiac basically corresponds to the zodiac at that time. As for why Ophiuchus was defeated, it remains to be verified. The longitude of the zodiac is 0 in Aries, so Aries has become the first sign of the zodiac.

6. Although the zodiac and the constellation could match at that time, there was something called precession (you can encyclopedia it yourself). After so many years, the accumulation of this amount has reached a qualitative change-today Aries Palace is almost completely within the scope of Pisces Palace, and the positions of other constellations can be imagined.

7. Since history is over, let's talk about the calculation method.

7. 1. It's easier to know which house you are in and see what solar terms are around your birthday. Yes, look at solar terms, because solar terms are the most stringent solar calendar. When the sun crosses the meridian of the Yellow River, it is the vernal equinox, 15 is clear, 30 Grain Rain, 45 long summer ... and 0 ~ 30 is Aries Palace and 30 ~ 60 Taurus Palace.

7. 1. 1. It should be noted that if you want more rigorous calculation, you must be accurate. For example, this year's summer solstice (2010)-June 2 1 day 19: 28, the ecliptic is 90° ゜-is, so people born after 7: 30 this evening are Cancer Palace, not twins.

7.2. If you want to know your own sun sign, it is very troublesome to calculate. You need to find a sun map, calculate the position of the sun on the day you were born, bring in precession, and calculate the operation of the constellation at that time. So, this is your real sun sign-so many people may be Ophiuchus.

7.3. Because the calculation method is too complicated and the information is not at hand, it is impossible to list the accurate calculation formula here. sorry

8. Moon constellation. In fact, the calculation method is basically the same as that of the sun constellation, except that it is calculated according to the position of the moon.

9. What is the "constellation" on the street now? This is based on the star map thousands of years ago, which confuses the position of the star house, the relationship between the constellation and the star house and evolves into a crude version. Yes, it's very simple. The real calculation method is very troublesome. It was definitely not written in a few words.

10. Recently, there is a new theory that birthday calculation is unreasonable, and life expectancy should be calculated from the day of conception. Well, it's difficult. Anyway, it's fortune telling. We are not responsible for such "science".

Note: I mean the star map of the Gregorian calendar in 2000, published by Beijing Planetarium and produced in 2006. More information is not at hand.