Stars spend most of their lives on the main sequence, fusing hydrogen into helium in their cores. The star's mass determines its temperature, luminosity, and lifetime.
Mass: 1.0 M☉
Temperature: 5,778 K
Luminosity: 1.0 L☉
Radius: 1.0 R☉
Lifetime: 10 Gyr
Age: 0 / 10 billion years
Energy output: 3.8 × 10²⁶ W