| Stage | Core temperature | Core density (kg/m3) | Duration of stage |
|---|---|---|---|
| Hydrogen fusion | 4 × 107 | 5 × 103 | 7 × 106 years |
| Helium fusion | 2 × 108 | 7 × 105 | 7 × 105 years |
| Carbon fusion | 6 × 108 | 2 × 108 | 600 years |
| Neon fusion | 1.2 × 109 | 4 × 109 | 1 year |
| Oxygen fusion | 1.5 × 109 | 1010 | 6 months |
| Silicon fusion | 2.7 × 109 | 3 × 1010 | 1 day |
| Core collapse | 5.4 × 109 | 3 × 1012 | ¼ second |
| Core bounce | 2.3 × 1010 | 4 × 1017 | milliseconds |
| Explosive supernova | about 109 | varies | 10 seconds |