Across
- 4. the last stage for the most massive stars
- 9. the last stage for average size stars like our Sun
- 10. a chart that graphs stars based on their luminosity and temperature
- 11. the measure of how bright a star is
- 12. the majority of stars are in this stable stage
- 13. the star present in our solar system
Down
- 1. a cloud of dust and gas where stars can be born
- 2. the process in which hydrogen fuses to form helium and energy
- 3. the amount of matter an object has
- 5. the area around the star where liquid water can exist
- 6. explosion at the end of a massive star's life
- 7. an attractive force between two objects
- 8. object in the universe that does nuclear fusion