Across
- 3. physical universe beyond the earth's atmosphere envelope of gases surrounding the earth
- 8. region of the solar system beyond Neptune
- 9. action of rotating around axis/center
- 11. place where someone or something is located
- 13. the dense central region of a planet
- 14. line passing from side to side through a body
- 16. group of celestial objects connected by force
- 18. supposition/system of ideas to explain
- 19. Small rocky body orbiting the sun
- 20. the star around which the earth orbits
Down
- 1. celestial object consisting of ice and dust
- 2. distance of a place north/south of the equator
- 4. move or cause in a circle around an axis
- 5. fixed luminous point in the night sky,is large
- 6. the planet on which we live; the world
- 7. a natural satellite of any planet
- 10. one complete circuit around an orbited body
- 12. outside part or uppermost layer of something
- 15. a single orbit of one object around another
- 17. force that attracts a body toward the center
- 19. Imaginary line about which a body rotates