Chapters.
Home page.
Images.
1 celestial sphere.
2 Earth's orbit.
3 Declination of the sun.
4 Day and night.
5 CNP and equator
6 Zenith - nadir.
7 Horizon.
8 Earth's speed of rotation.
9 Meridian and equator.
10 Azimuth.
11 Celestial Pole.
12 Latitude.
13 Point Sigma.
14 Ecliptic.
15 declination.
16 lunar declination.
17 lunar nodes.
