Obs. : 2015-04-13
Planet	Ly alpha (photons/cm^2/sec)
Mercury    5.066e+11
Venus      4.911e+11
Earth      4.760e+11
Mars       4.973e+11
Jupiter    4.717e+11
Saturn     4.861e+11
Uranus     5.108e+11
Neptune    5.142e+11
Pluto      5.173e+11