| Spectral Type | Temperature (°K) | Radius (Suns) | Mass (Suns) | Lifetime (millions of years) | Color |
|---|---|---|---|---|---|
| O | 40,000+ | 10+ | 50+ | 10 | |
| B | 20,000 | 5 | 10 | 100 | |
| A | 8,500 | 1.7 | 2 | 1,000 | |
| F | 6,500 | 1.3 | 1.5 | 3,000 | |
| G | 5,700 | 1 | 1 | 10,000 | |
| K | 4,500 | 0.8 | 0.7 | 50,000 | |
| M | 3,200 | 0.3 | 0.2 | 200,000 |
Stars are classified based on the energy they give off in the form of light, heat, and other radiation. Red-yellow stars become a white dwarf. Larger (blue) stars are more likely to end in a Supernova, or even become a Black Hole.