Across
- 1. a curved path followed by one object moving around another object
- 4. the force that pulls objects towards the center of the planet
- 6. the rise and fall of the sea level caused by the moon
- 8. a large hole caused by an explosion
- 9. a stage in a process of change or development
Down
- 2. to turn around a central fixed point
- 3. able to live on
- 5. connected with the moon
- 7. an object that moves around a larger object in space
- 8. crash into