Obs. : 2009-08-04
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.400e+11
Venus      3.386e+11
Earth      3.448e+11
Mars       3.423e+11
Jupiter    3.416e+11
Saturn     3.456e+11
Uranus     3.367e+11
Neptune    3.416e+11
Pluto      3.489e+11