Obs. : 2017-07-23
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.681e+11
Venus      3.621e+11
Earth      3.614e+11
Mars       3.674e+11
Jupiter    3.647e+11
Saturn     3.616e+11
Uranus     3.501e+11
Neptune    3.501e+11
Pluto      3.586e+11