Obs. : 2020-07-29
Planet	Ly alpha (photons/cm^2/sec)
Mercury    6.456e+08
Venus      7.032e+08
Earth      6.472e+08
Mars       7.026e+08
Jupiter    6.358e+08
Saturn     6.340e+08
Uranus     7.091e+08
Neptune    6.757e+08
Pluto      6.340e+08