| Questions | Answers |
|---|---|
| Which is the smallest planet within our solar system? | Mercury |
| Which planets have no moons? | Mercury and Venus |
| How long is one year on Jupiter? | 12 Earth years |
| Which is the largest star within our solar system? | The sun |
| How old is the sun? | Roughly 4.6 billion years old |
| Who invented astronomy? | The ancient Greeks |
| Who was the third astronaut to walk on the moon? | Pete Conrad |