Obs. : 2025-05-24
Planet	Ly alpha (photons/cm^2/sec)
Mercury    7.984e+08
Venus      8.067e+08
Earth      8.193e+08
Mars       7.998e+08
Jupiter    8.057e+08
Saturn     8.125e+08
Uranus     7.984e+08
Neptune    8.125e+08
Pluto      8.235e+08