Obs. : 2025-09-25
Planet	Ly alpha (photons/cm^2/sec)
Mercury    7.944e+08
Venus      8.193e+08
Earth      8.913e+08
Mars       7.996e+08
Jupiter    8.731e+08
Saturn     9.011e+08
Uranus     9.074e+08
Neptune    9.011e+08
Pluto      8.567e+08