Obs. : 2017-06-09
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.668e+11
Venus      3.681e+11
Earth      3.650e+11
Mars       3.680e+11
Jupiter    3.750e+11
Saturn     3.640e+11
Uranus     3.681e+11
Neptune    3.642e+11
Pluto      3.636e+11