ConstantSymbolValue
Speed of lightc2.9979 x 108 m/s
Planckh6.6261 x 10-34 J.s
GravitationalG6.6726 x 10-11 m3/kg/s2
Boltzmannk1.3807 x 10-23 J/K
Stefan-Boltzmann5.6705 x 10-8 J/m2/s/K4
Ideal Gas8314.5 J/kg/K
Radiationa7.5646 x 10-16 J/m3/K4
Wien's Law 2.8978 x 10-3 m.K
Atomic mass unitmH1.6605 x 10-27 kg
Proton massmp1.6726 x 10-27 kg
Neutron massmn1.6749 x 10-27 kg
Electron massme9.1094 x 10-31 kg
Electron chargee1.60218 x 10-19 C
Astronomical UnitA. U.1.496 x 1011 m
Parsecpc3.086 x 1016 m

Various Solar Constants
Mass of the SunM1.9891 x 1030 kg
Luminosity of the SunL3.8515 x 1026 J/s
Radius of the SunR6.9598 x 108 m
Effective Temperature of the SunTeff5777 K