Obs. : 2017-04-19
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.558e+11
Venus      3.592e+11
Earth      3.787e+11
Mars       3.530e+11
Jupiter    3.677e+11
Saturn     3.831e+11
Uranus     3.558e+11
Neptune    3.617e+11
Pluto      3.795e+11