Obs. : 2019-12-15
Planet	Ly alpha (photons/cm^2/sec)
Mercury    6.000e+08
Venus      6.179e+08
Earth      6.116e+08
Mars       5.950e+08
Jupiter    6.125e+08
Saturn     6.149e+08
Uranus     6.091e+08
Neptune    6.158e+08
Pluto      6.149e+08