Obs. : 2009-09-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.318e+11
Venus      3.324e+11
Earth      3.515e+11
Mars       3.412e+11
Jupiter    3.546e+11
Saturn     3.318e+11
Uranus     3.501e+11
Neptune    3.546e+11
Pluto      3.642e+11