Obs. : 2009-10-28
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.416e+11
Venus      3.437e+11
Earth      3.515e+11
Mars       3.581e+11
Jupiter    3.524e+11
Saturn     3.482e+11
Uranus     3.476e+11
Neptune    3.498e+11
Pluto      3.554e+11