Obs. : 2017-12-12
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.367e+11
Venus      3.367e+11
Earth      3.445e+11
Mars       3.186e+11
Jupiter    3.216e+11
Saturn     3.473e+11
Uranus     3.471e+11
Neptune    3.593e+11
Pluto      3.533e+11