Obs. : 2008-04-25
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.475e+11
Venus      3.507e+11
Earth      3.635e+11
Mars       3.532e+11
Jupiter    3.459e+11
Saturn     3.599e+11
Uranus     3.464e+11
Neptune    3.441e+11
Pluto      3.497e+11