Obs. : 2008-09-04
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.489e+11
Venus      3.489e+11
Earth      3.480e+11
Mars       3.489e+11
Jupiter    3.527e+11
Saturn     3.378e+11
Uranus     3.456e+11
Neptune    3.493e+11
Pluto      3.548e+11