What is the Zodiac?
If you could observe the motion of the Sun against the stars for an entire year, it would appear to trace out a large circle in the sky that we call the "ecliptic". This circle also happens to be the plane of the Earth's orbit around the Sun. The zodiac is a thin band of the sky on either side of the ecliptic. The word "zodiac" literally means "circle of life", since most of the zodiac signs are animals or people.