Obs. : 2025-10-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    7.932e+08
Venus      7.646e+08
Earth      8.332e+08
Mars       7.932e+08
Jupiter    8.146e+08
Saturn     8.373e+08
Uranus     8.241e+08
Neptune    8.332e+08
Pluto      8.636e+08