Obs. : 2023-04-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.894e+08
Venus      8.808e+08
Earth      8.934e+08
Mars       8.788e+08
Jupiter    8.948e+08
Saturn     9.145e+08
Uranus     8.822e+08
Neptune    9.161e+08
Pluto      8.826e+08