Across
- 1. what planet has the greenhouse effect
- 4. what planet has the strongest gravity
- 6. what star gives off light,heat,and energy for us
- 7. first space shuttle to land on the moon
- 8. what has craters
Down
- 2. planet with 62 moons
- 3. how do scientist find more information about Pluto
- 5. first man to walk the moon