Obs. : 2026-06-21
Planet	Ly alpha (photons/cm^2/sec)
Mercury    7.538e+08
Venus      7.573e+08
Earth      8.144e+08
Mars       7.676e+08
Jupiter    7.538e+08
Saturn     8.035e+08
Uranus     7.638e+08
Neptune    8.035e+08
Pluto      8.219e+08