Across
- 5. The totality of everything that exists
- 9. Only known planet on which life exists
- 10. Natural science that studies celestial objects
- 14. A celestial body orbiting a star
- 15. Icy bodies in space that release gas or dust
- 17. On or relating to the earth
- 18. Alpha Centauri is a _________
- 19. Path followed by an object revolving around another object,
Down
- 1. Force by which a body draws objects toward its center
- 2. Largest Planet in the Solar System
- 3. Positioned in or relating to the sky, or outer space
- 4. They are also called minor planets
- 6. Second planet from the sun
- 7. Object in space too small to be called an asteroid or comet.
- 8. The earth going around on its axis
- 11. Planet nearest to the sun
- 12. Dwarf Planet
- 13. Our _____ is called the Milk Way
- 16. Astronomical body that orbits planet Earth
- 18. Nearest star to earth