Obs. : 2025-10-04
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.618e+08
Venus      9.106e+08
Earth      8.133e+08
Mars       8.618e+08
Jupiter    8.837e+08
Saturn     8.133e+08
Uranus     8.565e+08
Neptune    8.173e+08
Pluto      8.044e+08