Across
- 2. The strength of gravity is determined by distance and _____
- 3. Most stars are made up of this element
- 4. Force that causes all processes in a star's life
- 7. The next stage in our Sun's life
- 9. kind of star that becomes a planetary nebula
- 11. Most common type of main sequence star
- 13. A white dwarf is made of this element
Down
- 1. Once cooled, a white dwarf will become a ________
- 5. Fusion in a supergiant ends with this element
- 6. Pairs of stars that revolve around each other
- 8. A star too small to fuse hydrogen into helium
- 10. Carbon is formed when this element undergoes fusion
- 12. Type of reaction that needs to happen for a star to be born