Obs. : 2017-06-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.680e+11
Venus      3.720e+11
Earth      3.713e+11
Mars       3.675e+11
Jupiter    3.705e+11
Saturn     3.714e+11
Uranus     3.705e+11
Neptune    3.704e+11
Pluto      3.735e+11