Across
- 2. period of darkness in each 24 hours
- 5. circular object
- 6. star around which the earth orbits
- 7. natural satellite of the earth
- 8. within which all things exist and move
- 10. fixed luminous point in the night sky
- 11. curved path of a celestial object around a star
- 12. region of the atmosphere and outer space seen from the earth
Down
- 1. period of light in each 24 hours
- 3. out steady light
- 4. natural agent that stimulates sight
- 9. world