Across
- 3. member of a double star system
- 7. group of stars that form a pattern
- 9. band of colors formed when light passes through a prism
- 11. innermost layer of the sub's atmosphere
- 13. violent storm on the sun
- 15. apparent change in the position of a star
Down
- 1. force of attraction between objects
- 2. dark area on the sun's surface
- 4. imaginary line through the center of a body
- 5. outermost layer of the sun's atmosphere
- 6. has gravity stronger than light can overcome
- 8. quasi-stellar radio source
- 10. center of the sun
- 12. huge collection of stars
- 13. gives off radio waves
- 14. star that suddenly increases brightness