Obs. : 2008-10-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.410e+11
Venus      3.540e+11
Earth      3.470e+11
Mars       3.480e+11
Jupiter    3.537e+11
Saturn     3.429e+11
Uranus     3.468e+11
Neptune    3.495e+11
Pluto      3.552e+11