Laws 1-4: Visibility calculations are deep. Fixed calendar can be appreciated even by school children in 3 or 4 days. |
Laws 5-6: Calculations are simplified/approximated to not fluster the inexprerienced; result - visibility of the moon - is not affected. |
Laws 7-9: 360 degrees; 60 minutes, seconds...; order of the 12 constellations. |
Laws 10-12: adding/subtracting angles. |
Laws 13-14: Velocities are constant. Earth encircled by all the spheres but isn't in the center. Notes 14,15 in Moznaim. |
Law 15: Mean and true motion. |
Law 16: Epoch. |
Law 17: Location: Jerusalem; see Chapter 17. |
Law 1: Movement of the Sun. Moznaim Note 6: calculations may be accurate only on the first day of the month; Note 7. 59′8.33″ Yale, p.99; Neugeb., p. 388ff |
Law 2: Movement of the Sun's apogee. Moznaim Note 10: over 800 years, apogee moved ~12 degrees and is in constellation of Cancer. Note 11: position - at 6PM. |
Laws 1-3: Tue position of the Sun. |
Law 4: Course correction table. |
Laws 5-10: Examples. |
Law 11: True seasons. |
Law 1: Moon: epicycle and deferent; movement as seen from Earth. See Moznaim notes! |
Law 2: Deferrent table. |
Law 3: Epicycle table. |
Law 4: Epoch. |
Law 5: Time of sighting correction table: ~20 minutes after sunset. |
Laws 1-2: Double elongation and its limits. See Moznaim notes! |
Laws 3-5: Course correction table. |
Laws 4-7: Parallax correction rules and table. |
Laws 8-9: Examples. |
Laws 1-4: Head movement, table and rules. |
Law 5: Example. |
Laws 6-18: Moon latitude. |
Law 19: Example. |