Obs. : 2008-09-18
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.433e+11
Venus      3.433e+11
Earth      3.423e+11
Mars       3.433e+11
Jupiter    3.498e+11
Saturn     3.296e+11
Uranus     3.400e+11
Neptune    3.445e+11
Pluto      3.518e+11