Obs. : 2009-01-18
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.506e+11
Venus      3.476e+11
Earth      3.470e+11
Mars       3.453e+11
Jupiter    3.506e+11
Saturn     3.425e+11
Uranus     3.476e+11
Neptune    3.517e+11
Pluto      3.408e+11