Obs. : 2009-10-17
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.387e+11
Venus      3.362e+11
Earth      3.507e+11
Mars       3.458e+11
Jupiter    3.562e+11
Saturn     3.362e+11
Uranus     3.503e+11
Neptune    3.562e+11
Pluto      3.619e+11