Across
- 3. the centre of solar system
- 4. a craft capable of traveling in outer space
- 5. a collection of star systems
- 7. the twin of the earth
- 10. a small celestial body composed of rock and metal
- 11. the closest planet to the sun
- 13. the largest planet in Solar System
- 15. the galaxy containing the solar system
Down
- 1. relating to the sun or utilizing the energies of the sun
- 2. a person trained to travel in a spacecraft
- 6. bands of light caused by charged solar particles
- 8. where we live in
- 9. any celestial body orbiting around a planet or star
- 12. the path of a celestial body in its revolution about another
- 14. a celestial body that revolves around the sun