Obs. : 2019-12-08
Planet	Ly alpha (photons/cm^2/sec)
Mercury    6.015e+08
Venus      6.220e+08
Earth      6.063e+08
Mars       5.999e+08
Jupiter    6.163e+08
Saturn     6.233e+08
Uranus     6.048e+08
Neptune    6.162e+08
Pluto      6.233e+08