The signs of the zodiac used in astrology refer to the constellations that lie along the plane of the ecliptic.

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The signs of the zodiac are based on the constellations that are located along the plane of the ecliptic, which is the path that the Sun appears to move through in the sky as the Earth orbits around it. This is why the signs are often referred to as "zodiacal constellations." However, it should be noted that the actual positions of these constellations in space do not perfectly align with the signs used in astrology, due to a phenomenon known as precession.

The Signs of the Zodiac Used in Astrology Refer to the Constellations