Across
- 2. scientist who study space
- 3. the second closest star to Earth
- 6. process of hydrogen atoms combining to create helium
- 8. the negative effects of all manmade lights
- 10. all stars are balls of this type of gas
Down
- 1. protects Earth from and humans from harmful effects of solar flares
- 4. appears as colorful lights in night sky when electrically charged particles collide
- 5. Norse sun goddess
- 7. sudden eruptions of brightness on the sun's surface that release huge amounts of energy
- 9. a group of many shooting stars