Across
- 2. short electromagnetic waves with nucleus of radioactive atom
- 5. a large bright star
- 6. distance between one wave and the next
- 7. hot ball of gas in space
- 8. everything in space
- 9. group of stars in space
- 10. arrangement of electromagnetic waves
- 13. makes colors
Down
- 1. cloud of dust in space
- 2. middle of the galaxy
- 3. when a star explodes
- 4. long electromagnetic waves
- 5. how fast light in a second
- 11. arms the galaxy
- 12. energy transfered thought matter an space