Obs. : 2025-07-28
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.359e+08
Venus      8.082e+08
Earth      8.731e+08
Mars       8.460e+08
Jupiter    8.107e+08
Saturn     8.632e+08
Uranus     8.181e+08
Neptune    8.632e+08
Pluto      8.829e+08