Obs. : 2009-11-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.524e+11
Venus      3.512e+11
Earth      3.680e+11
Mars       3.606e+11
Jupiter    3.574e+11
Saturn     3.490e+11
Uranus     3.612e+11
Neptune    3.574e+11
Pluto      3.559e+11