Obs. : 2025-08-12
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.458e+08
Venus      8.616e+08
Earth      8.343e+08
Mars       9.015e+08
Jupiter    8.616e+08
Saturn     8.347e+08
Uranus     8.495e+08
Neptune    8.347e+08
Pluto      8.449e+08