1. Lunar Craters Aristarchus

2. Formation of a Crater

3. Sketches

4. Aristarchus

5. Mare Fecunditatis

6. More Sketches

7. And More

10. Lunar Apennine Mountains

11. Nasa Photo

12. Alan Bean

13. Lunar Mountain Sketch: Pico

14. Weird Features

15. More Weird Features

16. Apollo 15 Apennine Mountains Hadley Rille

17. Near the Hadley Rille

19. Ural

20. Computing the Height

22. Angle Issues

23. Measuring the Chord and Segment

24. Using an Applet Instead

26. Hitchhiker’s Guide to the Moon

27. Lunar Republic

28. Measuring the Pixels Crater Wall Feature Number of Shadow Pixel Squares Length of Shadow Line (Miles) Outer Western Wall 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Outer Eastern Wall 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.