Obs. : 2009-02-27
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.474e+11
Venus      3.500e+11
Earth      3.466e+11
Mars       3.474e+11
Jupiter    3.474e+11
Saturn     3.436e+11
Uranus     3.529e+11
Neptune    3.474e+11
Pluto      3.395e+11