PhyConst.py

amu  =   1.66053886e-24    # /*  atomic mass unit          */
mp   =   1.67262171e-24    # /*  proton mass               */
mn    =  1.67492728e-24    # /*  neutron mass              */
me    =  9.1093826e-28     # /*  electron mass             */
mH    =  1.6733e-24        # /*  Hydrogen atom mass        */
kB    =  1.3806505e-16     # /*  Boltzmann constant        */
sigma =  5.67051e-5        # /*  Stephan Boltmann constant */
sigmaT = 6.6524e-25       #  /*  Thomson Cross section  */
NA    =  6.0221367e23     #  /*  Avogadro Contant          */
c     =  2.99792458e10    #  /*  Speed of Light            */
Msun  =  2.e33            #  /*  Solar Mass                */
Rsun  =  6.96e10          #  /*  Solar Radius              */
Lsun  = 3.8389999999999997e+33 # /* Solar Luminosity       */
Mearth =  5.9736e27        #  /*  Earth Mass                */
Rearth = 6.378136e8       #  /*  Earth Radius              */
G     =  6.6726e-8        #  /*  Gravitational Constant    */
h     =  6.62606876e-27   #  /*  Planck Constant           */
pc    =  3.0856775807e18  #  /*  parsec                    */
ly    =  0.9461e18        #  /*  light year                */
au    =  1.49597892e13    #  /*  astronomical unit         */
eV    =  1.602176463158e-12 #/*  electron Volt in erg      */
yr    =  365.0*24.0*60.0*60.0 #/*  year in sec      */