Is the constellation corresponding to the birth time a real constellation in the celestial body? Or is it only used in astrology in western countries?

True, not only true, but also the zodiac 12. For example, Aquarius is 1.20~2. 18. During this time, Aquarius rises and sets with the sun:

draw

However, due to the deviation of the earth's axis for thousands of years, the experience summarized by the old ancients is not correct. During Aquarius time 1.20~2. 18, the sun will rise and fall with Capricorn, an Aquarius neighbor.

So now there is a constellation of 13, which is based on the deflection of the earth axis and the crossing of the ecliptic 13.

Personal feeling personality is still the standard of 12 constellation.