Obs. : 2009-10-12
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.405e+11
Venus      3.405e+11
Earth      3.527e+11
Mars       3.447e+11
Jupiter    3.602e+11
Saturn     3.405e+11
Uranus     3.527e+11
Neptune    3.562e+11
Pluto      3.689e+11