Here's a breakdown:
* Earth's Orbit: The Earth orbits the Sun.
* Celestial Sphere: Imagine a giant sphere with the Earth at its center. We project the stars and constellations onto this imaginary sphere, called the celestial sphere.
* Ecliptic: The Sun's apparent path across the celestial sphere is called the ecliptic.
* Zodiac: The zodiac is a band of constellations that lie along the ecliptic. It's approximately 16-18 degrees wide, centered on the ecliptic.
So, while the constellations of the zodiac are physically located in the sky, the "zodiac" itself is a concept that defines the Sun's apparent path.