Obs. : 2025-08-04
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.437e+08
Venus      8.250e+08
Earth      8.148e+08
Mars       8.809e+08
Jupiter    8.250e+08
Saturn     8.213e+08
Uranus     8.208e+08
Neptune    8.213e+08
Pluto      8.289e+08