Across
- 7. happens two times in a year during spring and autumn
- 8. an instance of revolving
- 9. a chart of pages showing the days
- 12. the envelope of gases surrounding the earth
- 13. the curved path at which the earth revolves around
- 14. an imaginary line at which a body rotates
- 16. relating to a planet
Down
- 1. a very large star of high luminosity and low surface temperature
- 2. resembling the moon
- 3. the most important part of something
- 4. the luminous envelope of a star from which its light and heat radiate
- 5. the action of rotating around and axis or center
- 6. the rarefied gaseous envelope of the sun and other stars
- 10. the study of the moon and stars
- 11. happens two times a year during summer and winter
- 15. relating to or determined by the sun