Obs. : 2025-02-21
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.538e+08
Venus      8.813e+08
Earth      9.018e+08
Mars       9.628e+08
Jupiter    9.492e+08
Saturn     8.609e+08
Uranus     9.401e+08
Neptune    8.609e+08
Pluto      8.808e+08