Obs. : 2009-08-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.415e+11
Venus      3.423e+11
Earth      3.445e+11
Mars       3.416e+11
Jupiter    3.445e+11
Saturn     3.415e+11
Uranus     3.415e+11
Neptune    3.445e+11
Pluto      3.474e+11