Obs. : 2009-09-29
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.469e+11
Venus      3.469e+11
Earth      3.538e+11
Mars       3.592e+11
Jupiter    3.520e+11
Saturn     3.455e+11
Uranus     3.541e+11
Neptune    3.527e+11
Pluto      3.566e+11