Obs. : 2025-11-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.304e+08
Venus      8.304e+08
Earth      7.990e+08
Mars       8.070e+08
Jupiter    7.951e+08
Saturn     7.765e+08
Uranus     7.990e+08
Neptune    7.765e+08
Pluto      7.768e+08