Obs. : 2025-04-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.766e+08
Venus      8.781e+08
Earth      8.846e+08
Mars       8.957e+08
Jupiter    8.817e+08
Saturn     8.781e+08
Uranus     8.760e+08
Neptune    8.781e+08
Pluto      8.696e+08