Obs. : 2013-04-07
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.873e+11
Venus      3.945e+11
Earth      4.677e+11
Mars       3.945e+11
Jupiter    4.032e+11
Saturn     4.529e+11
Uranus     3.934e+11
Neptune    3.987e+11
Pluto      4.280e+11