Obs. : 2020-07-31
Planet	Ly alpha (photons/cm^2/sec)
Mercury    6.501e+08
Venus      6.965e+08
Earth      6.524e+08
Mars       7.048e+08
Jupiter    6.472e+08
Saturn     6.453e+08
Uranus     7.044e+08
Neptune    6.798e+08
Pluto      6.472e+08