Obs. : 2025-05-18
Planet	Ly alpha (photons/cm^2/sec)
Mercury    7.927e+08
Venus      7.768e+08
Earth      8.165e+08
Mars       8.083e+08
Jupiter    7.962e+08
Saturn     7.768e+08
Uranus     7.927e+08
Neptune    7.768e+08
Pluto      7.630e+08