Obs. : 2009-04-21
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.580e+11
Venus      3.541e+11
Earth      3.452e+11
Mars       3.541e+11
Jupiter    3.448e+11
Saturn     3.496e+11
Uranus     3.541e+11
Neptune    3.448e+11
Pluto      3.554e+11