Which constellation is necessitated in a purely astronomical definition of the zodiac but is excluded from the traditional 12-sign astrological system?
Answer
Ophiuchus
Ophiuchus is a constellation the Sun passes through between Sagittarius and Scorpius. It is omitted from the traditional astrological zodiac because the system was established by dividing the ecliptic into 12 equal parts based on historical convenience.
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The Ecliptic: Crash Course Kids #37.2 - YouTube
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