Obs. : 2018-04-30
Planet	Ly alpha (photons/cm^2/sec)
Mercury    5.505e+11
Venus      5.447e+11
Earth      5.161e+11
Mars       5.343e+11
Jupiter    5.161e+11
Saturn     5.287e+11
Uranus     5.550e+11
Neptune    5.472e+11
Pluto      5.343e+11