Obs. : 2023-04-19
Planet	Ly alpha (photons/cm^2/sec)
Mercury    9.000e+08
Venus      8.999e+08
Earth      9.008e+08
Mars       8.903e+08
Jupiter    9.131e+08
Saturn     9.245e+08
Uranus     9.000e+08
Neptune    9.263e+08
Pluto      9.035e+08