Across
- 2. negative effects of human-made lights
- 4. stars are balls of this gas
- 8. besides the sun, its the next closest star to Earth
- 10. scientists who study space
- 11. a sudden eruption of brightness in the sun
Down
- 1. protects humans from solar flares
- 3. Norse sun goddess
- 5. released when stars fuse hydrogen into helium
- 6. group of many shooting stars
- 7. process of combining atoms
- 9. this animal will not come to shore to nest if there is too much light