Across
- 1. Universe as a whole
- 5. hole Region of space with extremely strong gravitational pull
- 8. Luminous sphere of plasma in space
- 12. Object that orbits a planet or star
- 13. Instrument used to observe distant objects in space
- 14. Earth's natural satellite
- 16. Path followed by a celestial object around another object
- 18. Person who travels in space
- 19. Vast cloud of gas and dust in space
Down
- 2. Craft designed for space travel
- 3. Vehicle used to travel through space
- 4. Celestial body that orbits a star
- 6. Study of celestial objects and phenomena
- 7. Huge system of stars, gas, and dust held together by gravity
- 9. Extraterrestrial being
- 10. Small celestial body that burns up upon entering Earth's atmosphere
- 11. Celestial object composed of ice and dust
- 12. The star at the center of our solar system
- 15. Force that attracts objects toward each other
- 17. Group of stars that form a recognizable pattern