Obs. : 2009-02-18
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.517e+11
Venus      3.544e+11
Earth      3.456e+11
Mars       3.517e+11
Jupiter    3.517e+11
Saturn     3.529e+11
Uranus     3.561e+11
Neptune    3.535e+11
Pluto      3.383e+11