Across
- 6. event where the sun reaches its highest or lowest point in the sky
- 7. main larger circular orbit in the earth centered model of the universe
- 11. old scientific idea where earth is placed at the center of the universe
- 14. circular orbit where center moves along the circumference of a larger circular path
- 15. apparent movement of a planet moving backwards
- 17. hypothetical invisible medium once believed to fill all of space
- 19. astronomical system where the sun is at the center of the solar system
- 20. daily movement of celestial objects across the sky
Down
- 1. imaginary ball surrounding earth where stars and planets seem to sit
- 2. figure eight pattern that the sun traces in the sky
- 3. precise moment twice a year where the sun crosses the celestial equator
- 4. anything relating to the sky, space, or the physical universe
- 5. recognizable pattern of stars, not one of the official 88
- 8. path the sun takes across the sky over a year
- 9. a period in the year based on the position of earth
- 10. one celestial body moves in front of another blocking its light
- 12. planet made of mostly rock and metal that has a solid surface
- 13. yearly apparent movement of the stars, sun, and planets viewed from earth
- 16. a group of stars
- 18. imaginary belt in the sky divided into 12 distinct signs