Across
- 3. someone who has studied science
- 5. circular movement
- 6. the first object turn in a circle around the second object
- 7. an extremely large group of stars and planets
- 9. curved path in space that is followed by an object going round
- 10. revolve, turn around a central point
Down
- 1. a scientist who studies the stars, planets and other natural objects in space
- 2. finding out
- 4. one complete turn in a circle
- 8. an imaging line through the middle of something