Across
- 2. The study of stars
- 4. The law or culture of stars
- 5. The nearest neighbor galaxy to us
- 6. An educated guess about the result of an experiment
- 9. A model of our solar system that believes the earth is the center of the universe
- 10. The galaxy our solar system exist in
Down
- 1. The time it takes light to travel 1 AU
- 3. Distance bewteen the sun and earth
- 7. How many planets are in our solar system?
- 8. The distance light travels in one year