key term - Zodiac

Definition

The zodiac is a belt-shaped region in the sky that extends approximately 8-9 degrees on either side of the ecliptic, where the apparent paths of the sun, moon, and planets can be observed. It is divided into twelve equal parts, each associated with a constellation.

5 Must Know Facts For Your Next Test

1. The zodiac constellations are used to track the movement of celestial bodies.
2. These twelve constellations are historically significant in both astronomy and astrology.
3. Each zodiac sign covers 30 degrees of celestial longitude.
4. The ecliptic plane is crucial for understanding the path of objects within the zodiac.
5. The concept of the zodiac dates back to ancient Babylonian astronomy.

Review Questions

Related terms

Ecliptic:

The apparent path that the Sun traces out in the sky during a year, which is central to defining the zodiac.

Constellation: A recognized pattern of stars that forms an imaginary shape or figure and often has historical significance.

Celestial Sphere:

An imaginary sphere surrounding Earth to which all celestial bodies can be thought to be attached.