Obs. : 2020-04-28
Planet	Ly alpha (photons/cm^2/sec)
Mercury    6.678e+08
Venus      6.502e+08
Earth      6.344e+08
Mars       6.311e+08
Jupiter    6.285e+08
Saturn     6.285e+08
Uranus     6.678e+08
Neptune    6.450e+08
Pluto      6.285e+08