Obs. : 2025-10-21
Planet	Ly alpha (photons/cm^2/sec)
Mercury    7.821e+08
Venus      7.592e+08
Earth      8.348e+08
Mars       7.821e+08
Jupiter    8.171e+08
Saturn     8.380e+08
Uranus     8.265e+08
Neptune    8.348e+08
Pluto      8.539e+08