Across
- 1. Educated Explanation
- 4. 63,000 astronomical units
- 7. Based on inverse square law
- 9. Direct observation
- 11. Step to ask a question
- 12. Describes observation
- 13. Test of the answer
- 15. Distance from earth to sun
- 16. Distances within galaxies
Down
- 1. Galaxies move away from us
- 2. Apparent shift of objects position
- 3. Foundation of science
- 5. Uses right triangles
- 6. Based on the speed of light
- 8. Study outside the Earth
- 10. Explains observation
- 14. Seeks to understand