Obs. : 2017-04-30
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.794e+11
Venus      3.761e+11
Earth      3.724e+11
Mars       3.896e+11
Jupiter    3.775e+11
Saturn     3.674e+11
Uranus     3.794e+11
Neptune    3.741e+11
Pluto      3.681e+11