The Sun is the star at the center of the Solar System. It is a nearly perfect sphere of hot plasma, with internal convective motion that generates a magnetic field via a dynamo process. It is by far the most important source of energy for life on Earth.

Surface temperature: 5,778 K

Escape velocity (from the surface): 617.7 km/s; 55 × Earth

Equatorial surface gravity: 274 m/s²; 28 × Earth

Mean radiance (I_sol): 2.009×10⁷ W·m⁻²·sr⁻¹

Luminosity (L_sol): 3.828×10²⁶ W; ≈ 3.75×10²⁸ lm; ≈ 98 lm/W efficacy

Did you know: The sun is made up of colors as plentiful as those that form the rainbow.