Obs. : 2025-04-28
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.692e+08
Venus      8.734e+08
Earth      8.892e+08
Mars       8.502e+08
Jupiter    8.654e+08
Saturn     8.734e+08
Uranus     8.666e+08
Neptune    8.734e+08
Pluto      8.965e+08