This section describes the ecliptic and ecliptic plane.
The Ecliptic Plane is defined as the plane that contain the orbit of the Earth around the Sun.
The Ecliptic is defined as the intersection of the Ecliptic Plane and the Celestial Sphere.
The following picture provides a good illustration of the Ecliptic and Ecliptic Plane in
the Celestial Sphere system, http://www.astro.virginia.edu
Notice that we have two base circles on the Celestial Sphere now: Ecliptic and Celestial Equator,
Looking at the Ecliptic and the Celestial Equator on the Celestial Sphere, you will see:
- Earth's Inclination is the angle between the Ecliptic plane and the Equator plane, which is almost a constant of 23.5 degree.
- Equinoxes, the Vernal Equinox and the Autumnal Equinox, are two intersection points of the Ecliptic and the Celestial Equator.
Table of Contents
About This Book
Quick Introduction to Astrology
►Basics of Astrology and Astronomy
What Is Astronomy
The Solar System
The Celestial Sphere
The Celestial Sphere Coordinate System
The Celestial Meridian and Zenith
The Precession - Rotation of Earth's Axis
Introduction to Western Zodiac Signs
Horoscope and Horoscopic Astrology
Horoscope and Planets
Chinese Astrology and Horoscope
Chinese Zodiac Animal Signs
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