Obs. : 2025-07-19
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.297e+08
Venus      8.501e+08
Earth      8.436e+08
Mars       8.326e+08
Jupiter    8.404e+08
Saturn     8.579e+08
Uranus     8.595e+08
Neptune    8.579e+08
Pluto      8.475e+08