| # | Title | Length |
|---|
| 1 | Chapter 5: Why Do We Have Night and Day, Winter and Summer?, Part 1 | 6:10 |
| 2 | Chapter 5: Why Do We Have Night and Day, Winter and Summer?, Part 2 | 5:04 |
| 3 | Chapter 5: Why Do We Have Night and Day, Winter and Summer?, Part 3 | 4:42 |
| 4 | Chapter 5: Why Do We Have Night and Day, Winter and Summer?, Part 4 | 6:41 |
| 5 | Chapter 5: Why Do We Have Night and Day, Winter and Summer?, Part 5 | 8:55 |
| 6 | Chapter 5: Why Do We Have Night and Day, Winter and Summer?, Part 6 | 7:09 |
| 7 | Chapter 6: What Is the Sun?, Part 1 | 7:34 |
| 8 | Chapter 6: What Is the Sun?, Part 2 | 1:32 |
| 9 | Chapter 6: What Is the Sun?, Part 3 | 4:20 |
| 10 | Chapter 6: What Is the Sun?, Part 4 | 3:43 |
| 11 | Chapter 6: What Is the Sun?, Part 5 | 3:18 |
| 12 | Chapter 6: What Is the Sun?, Part 6 | 2:22 |
| 13 | Chapter 6: What Is the Sun?, Part 7 | 3:11 |
| 14 | Chapter 6: What Is the Sun?, Part 8 | 10:54 |