Across
- 4. a sun
- 6. not regular
- 7. stars make-
- 11. a star
- 13. atomic number 2
- 14. swirling in a curve
- 17. measurement of how far
Down
- 1. very large star
- 2. the nature of something's ingredients
- 3. small
- 5. system of stars held by gas and dust
- 8. the atmosphere seen from the earth
- 9. lens or resembling a lens
- 10. darkness
- 12. a galaxy that has an elliptical shape
- 15. atomic number 1
- 16. form of matter