Obs. : 2025-04-12
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.709e+08
Venus      8.709e+08
Earth      8.540e+08
Mars       8.293e+08
Jupiter    8.464e+08
Saturn     8.709e+08
Uranus     8.570e+08
Neptune    8.709e+08
Pluto      8.314e+08