Obs. : 2008-10-31
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.457e+11
Venus      3.642e+11
Earth      3.500e+11
Mars       3.546e+11
Jupiter    3.626e+11
Saturn     3.381e+11
Uranus     3.499e+11
Neptune    3.569e+11
Pluto      3.638e+11