Across
- 4. A celestial body that orbits a star
- 5. An event where one celestial body moves into the shadow of another
- 9. An Earth-centered model of the universe
- 10. The darkest part of a shadow, especially during an eclipse
- 15. A group of stars forming a recognizable pattern
- 16. The time when day and night are of equal length
- 17. The force that attracts objects toward one another
- 18. The path one object takes around another
Down
- 1. A distinct stage in a process, such as the phases of the Moon
- 2. The spinning of an object around its axis
- 3. The time when the Sun reaches its highest or lowest point in the sky at noon
- 6. A small icy body that orbits the Sun, often with a glowing tail
- 7. A massive ball of gas that emits light and heat
- 8. A Sun-centered model of the solar system
- 11. The movement of one object around another
- 12. A small rock or particle from space that burns up upon entering Earth's atmosphere
- 13. The lighter, outer part of a shadow
- 14. An object that orbits another object in space