Obs. : 2025-10-03
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.515e+08
Venus      9.132e+08
Earth      8.244e+08
Mars       8.515e+08
Jupiter    8.888e+08
Saturn     8.299e+08
Uranus     8.698e+08
Neptune    8.299e+08
Pluto      8.154e+08