|
| Central density |
| |
|---|---|---|---|---|
Stage | Central temperature (K) | (kg/m3) | (lb/yd3) | Duration of stage |
Hydrogen fusion | 4 × 107 | 5 × 103 | 8.4 × 103 | 7 × 106 years |
Helium fusion | 2 × 108 | 7 × 105 | 1.2 × 106 | 5 × 105 years |
Carbon fusion | 6 × 108 | 2 × 108 | 3.4 × 108 | 600 years |
Neon fusion | 1.2 × 109 | 4 × 109 | 6.7 × 109 | 1 year |
Oxygen fusion | 1.5 × 109 | 1 × 1010 | 1.7 × 1010 | 6 months |
Silicon fusion | 2.7 × 109 | 3 × 1010 | 5.1 × 1010 | 1 day |
Core collapse | 5.4 × 109 | 3 × 1012 | 5.1 × 1012 | 0.2 second |
Core bounce | 2.3 × 1010 | 4 × 1017 | 6.7 × 1017 | milliseconds |
Supernova explosion | about 109 | varies | varies | hours |