Obs. : 2025-12-12
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.166e+08
Venus      8.157e+08
Earth      7.414e+08
Mars       8.190e+08
Jupiter    7.393e+08
Saturn     8.420e+08
Uranus     7.763e+08
Neptune    8.420e+08
Pluto      8.297e+08