Obs. : 2018-03-04
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.460e+11
Venus      3.460e+11
Earth      3.508e+11
Mars       3.485e+11
Jupiter    3.497e+11
Saturn     3.482e+11
Uranus     3.458e+11
Neptune    3.478e+11
Pluto      3.480e+11