Obs. : 2025-04-29
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.616e+08
Venus      8.679e+08
Earth      8.719e+08
Mars       8.415e+08
Jupiter    8.550e+08
Saturn     8.679e+08
Uranus     8.573e+08
Neptune    8.679e+08
Pluto      8.861e+08