Obs. : 2018-04-09
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.541e+11
Venus      3.457e+11
Earth      3.498e+11
Mars       3.465e+11
Jupiter    3.505e+11
Saturn     3.465e+11
Uranus     3.501e+11
Neptune    3.497e+11
Pluto      3.473e+11