Obs. : 2025-10-15
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.378e+08
Venus      7.812e+08
Earth      8.152e+08
Mars       8.378e+08
Jupiter    7.846e+08
Saturn     8.152e+08
Uranus     8.056e+08
Neptune    8.152e+08
Pluto      8.518e+08