Stars, Galaxies and the Universe
Celestial Sphere
- Celestial Sphere - an imaginary sphere where the earth is the center and on which all celestial objects are considered to lie
- North celestial pole-point directly above the certh's north pole
- South celestial pole-point directly below earth's South Pole
- Celestial equator-projection of the earth's equator into space
- Ecliptic
Ecliptic - "road of the sun"
- imaginary path that the sun follows on the celestial sphere over the course of a years
- Equinox
The vernal and autumn equinox happen when the celestial equator and ediptic intersect
On these days the sun reaches its highest point above the equator