Obs. : 2019-12-07
Planet	Ly alpha (photons/cm^2/sec)
Mercury    6.027e+08
Venus      6.252e+08
Earth      6.082e+08
Mars       5.999e+08
Jupiter    6.252e+08
Saturn     6.283e+08
Uranus     6.054e+08
Neptune    6.145e+08
Pluto      6.283e+08