Mathematical constants

   pi_greco     3.141592653589793238462643
   e_           2.718281828459045235360287 = lim(1+1/n)^n  n -> oo

               Physical constants

   c_     2.997924580E8 m/s         light velocity
   mu0    4*pi_greco*1.E-7 H/m      vacuum magnetic permeability
   eps0   8.854187817E-12 F/m       dielectrical constant
   e_     1.60217733E-19 C          elementary charge
   Fi_0   2.06783461E-15 Wb         elementary magnetic flux
   N_a    6.0221367E23 mol^-1       Avogadro number
   u_     1.6605402E-27 kg          atomic mass unit
   u_     931.5016 MeV                     "
   G_     6.67259E-11 N*m^2/kg^2    gravitazional constant
   h_     6.6260755E-34 J*s         Planck constant
   k_     1.380658E-23 J/K          Boltzmann constant
   sig_   5.67051E-8 W/(m^2*K^4)    Stefan-Boltzmann constant
   1/alf_ 137.0359895               inverse fine structure constant
   R_oo   10973731.534 m^-1         Rydberg constant

                     Conversions

      1 eV = 1.60217733E-19 J

               Astrophysical Constants

   1 sideral year       = 3.1558149984D7 s
   1 light year         = 9.4605E15 m
   1 astronomical unit  = 1.495985E11 m
   1 parsec             = 3.0856E16 m
   1 solar mass         = 1.989E30 kg
   Earth mass           = 5.977E24 kg
   Equatorial radius    = 6.37817E6 m


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