Obs. : 2025-04-18
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.567e+08
Venus      8.573e+08
Earth      8.476e+08
Mars       8.789e+08
Jupiter    8.676e+08
Saturn     8.573e+08
Uranus     8.678e+08
Neptune    8.567e+08
Pluto      8.485e+08