8A - Planetery astronomy
05. Historical astronomy
10. Solar system mechanics
20. Earth - moon mechanics
30. Views from earth
35. Views from earth - 2
40. Planetary properties: globes, hemispheres, & maps
50. Planetary properties - 2: The planets
60. Planetary properties - 3: Planetoids, minor objects
70. Planetary properties - 4: Planetary characteristics
80. Planetary properties - 5: Comets and the search For life
8B - Stellar astronomy
10. The sun
20. Stellar spectra
30. Stellar evolution
40. Black holes
50. Stellar miscellaneous
8C - Cosmology
10. Models of the universe
20. Gravitational effects
8D - Miscellaneous
10. Miscellaneous astronomy
20. Telescopes
30. Astronomical instruments
8E - Astronomy teaching techniques
30. Techniques and projects
