1. Chapter 1 Orion

2. Figure 1.1 Lunar Phases

3. Figure 1.2 Lunar Eclipse

4. Figure 1.3 Solar Eclipse

5. Figure 1.4 Solar Eclipse Types

6. Figure 1.5 Eclipse Geometry

7. Figure 1.6 Eclipse Tracks

8. Figure 1.7 Planetary Motions

9. Figure 1.8 Geocentric Model

10. Figure 1.9 Ptolemy’s Model

11. Figure 1.10 Nicholas Copernicus

12. Figure 1.11 Retrograde Motion

13. Discovery 1-1a The Scientific Method

14. Discovery 1-1b The Scientific Method

15. Figure 1.12 Galileo Galilei

16. Figure 1.13 Galilean Moons

17. Figure 1.14a Venus Phases

18. Figure 1.14b Venus Phases

19. Figure 1.15 Johannes Kepler

20. Figure 1.16 Tycho Brahe

21. Figure 1.17 Ellipse

22. Figure 1.18 Kepler’s Second Law

23. More Precisely 1-1 Some Properties of Planetary Orbits

24. Figure 1.19 Astronomical Unit

25. Figure 1.20 Isaac Newton

26. Figure 1.21 Newton’s First Law

27. Figure 1.22 Gravity

28. Figure 1.23 Gravitational Force

29. Figure 1.24 Sun’s Gravity

30. Figure 1.25 Orbits