Is constellation 13 a reflected laser?

13 constellation does not refer to reflected laser, but refers to the existence of 13 constellation. In astrology, constellations are usually divided according to the position of the sun on the ecliptic. The zodiac is the earth's orbit around the sun. Seen from the earth, the sun runs on this belt every year. However, there are actually 13 constellations on the ecliptic, but astrology usually only focuses on 12 constellations.

13 constellation is Ophiuchus, which lies between Scorpio and Sagittarius. The existence of Ophiuchus is caused by the oscillation of the earth's rotation axis (called precession). Precession completes its cycle about every 26,000 years, during which the direction of the earth's rotation axis will gradually change. Due to the influence of precession, the position of the sun on the ecliptic will change, thus making Ophiuchus appear on the ecliptic.

Ophiuchus exists objectively, but it is not included in the constellation system in modern astrology. Astrologers still use the traditional 12 constellation for constellation analysis. Therefore, even if your birthday is in Ophiuchus, you will still be classified as the next constellation (Scorpio or Sagittarius).