Across
- 2. a large round body that revolves around a star in a clear orbit
- 5. phases a change in the appearance of the moon's shape
- 9. Earths spinning in space
- 11. the largest planet in the solar system
- 12. Earth does this around the sun once a year
- 13. made of rock and metal
- 15. a group of stars that seems to form a picture in the night sky
- 17. an object that moves around another larger object in space
Down
- 1. the first person to study the night sky using a telescope
- 3. a ball of rock and frozen gases
- 4. a time of year with a particular type of weather
- 6. the path that an object takes around another object in space
- 7. a force that pulls objects toward each other
- 8. the smallest planet in our solar system
- 10. Earth is divided into theses halves
- 14. zone the region of space where the temperature range allows life to thrive
- 16. an imaginary line through Earth