Obs. : 2025-09-28
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.423e+08
Venus      9.037e+08
Earth      9.179e+08
Mars       8.321e+08
Jupiter    9.443e+08
Saturn     9.265e+08
Uranus     9.474e+08
Neptune    9.265e+08
Pluto      8.900e+08