Which constellation is not part of the Zodiac?

Cassiopeia is the constellation that is not part of the Zodiac. The Zodiac is a band of the sky divided into twelve sections known as zodiac signs, which are associated with specific constellations that the Sun appears to move through during the course of the year. Each zodiacal constellation is linked to a specific time period and is used in astrology. Scorpius, Virgo, and Gemini are all part of this twelve-sign system.

In contrast, Cassiopeia is located in the northern sky and is primarily recognized for its distinctive W shape made up of five bright stars. It is not included in the Zodiac because it does not lie along the ecliptic plane, the path that the Sun, Moon, and planets travel through the sky, which is where the Zodiac constellations are located. Instead, Cassiopeia is positioned more toward the northern celestial hemisphere, making it unrelated to the astrological and astronomical context of the Zodiac.