Obs. : 2025-10-28
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.588e+08
Venus      8.316e+08
Earth      8.122e+08
Mars       8.588e+08
Jupiter    8.367e+08
Saturn     8.007e+08
Uranus     8.292e+08
Neptune    8.007e+08
Pluto      8.183e+08