Obs. : 2010-02-18
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.851e+11
Venus      3.812e+11
Earth      3.750e+11
Mars       3.750e+11
Jupiter    3.812e+11
Saturn     3.747e+11
Uranus     3.774e+11
Neptune    3.847e+11
Pluto      3.818e+11