Across
- 5. Used to measure the distance light travels in one year
- 6. Object with such strong gravity it fuses elements
- 7. How many times hotter the surface of the sun is than a campfire
- 8. The stage of the life cycle our sun is in
- 9. So strong, even light cannot escape
- 11. Another name for the North Star
- 13. The densest element at the center of a star
Down
- 1. atoms becoming so hot they fuse together
- 2. The layer between the core and the surface
- 3. The least dense element at the surface of a star
- 4. When a low mass star uses all of its fuel
- 6. What happens when supergiants explode
- 10. The hottest layer of a star
- 12. The star that is closest to Earth