Astronomical Foundations
3. Zodiacal Constellations
4. Precession of the Equinoxes
5. Tropical vs Sidereal Zodiac
6. Celestial Sphere
7. Right Ascension & Declination
8. Ecliptic Coordinates
9. Astronomical Units
10. Stellar Parallax (Astronomy)
11. Proper Motion
12. Stellar Evolution
13. Galactic Center
14. Dark Matter & Energy
15. Exoplanets
Planets around other stars and astrological debate.