Obs. : 2025-07-06
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.231e+08
Venus      8.105e+08
Earth      7.954e+08
Mars       8.250e+08
Jupiter    8.148e+08
Saturn     8.061e+08
Uranus     8.104e+08
Neptune    8.061e+08
Pluto      7.954e+08