Obs. : 2026-06-29
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.390e+08
Venus      8.431e+08
Earth      8.600e+08
Mars       7.684e+08
Jupiter    8.390e+08
Saturn     7.812e+08
Uranus     7.684e+08
Neptune    7.952e+08
Pluto      8.600e+08