Obs. : 2025-05-17
Planet	Ly alpha (photons/cm^2/sec)
Mercury    7.934e+08
Venus      7.836e+08
Earth      8.051e+08
Mars       8.033e+08
Jupiter    7.877e+08
Saturn     7.836e+08
Uranus     7.934e+08
Neptune    7.836e+08
Pluto      7.550e+08