Across
- 3. The movement of a planet around a star
- 5. Study stars like the sun
- 6. In the universe there are many of these
- 7. You can see many of them in a clear night
- 8. Systematically angage with science and its further development
- 9. Everything
Down
- 1. A strange thing in the sky wich can fly
- 2. Mixture of gases around a planet
- 4. We orbit in our...
- 6. The attraction between a celestial body and an other object