Obs. : 2015-04-01
Planet	Ly alpha (photons/cm^2/sec)
Mercury    4.740e+11
Venus      5.002e+11
Earth      4.894e+11
Mars       4.847e+11
Jupiter    5.248e+11
Saturn     4.871e+11
Uranus     4.769e+11
Neptune    4.738e+11
Pluto      4.800e+11