Obs. : 2009-04-18
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.540e+11
Venus      3.451e+11
Earth      3.449e+11
Mars       3.390e+11
Jupiter    3.300e+11
Saturn     3.467e+11
Uranus     3.390e+11
Neptune    3.300e+11
Pluto      3.313e+11