Obs. : 2009-09-21
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.314e+11
Venus      3.299e+11
Earth      3.528e+11
Mars       3.364e+11
Jupiter    3.552e+11
Saturn     3.314e+11
Uranus     3.515e+11
Neptune    3.552e+11
Pluto      3.631e+11