Obs. : 2023-05-16
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.756e+08
Venus      8.489e+08
Earth      8.456e+08
Mars       8.446e+08
Jupiter    8.756e+08
Saturn     8.789e+08
Uranus     8.633e+08
Neptune    8.974e+08
Pluto      8.540e+08