Obs. : 2017-12-19
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.629e+11
Venus      3.644e+11
Earth      3.722e+11
Mars       3.649e+11
Jupiter    3.636e+11
Saturn     3.668e+11
Uranus     3.698e+11
Neptune    3.683e+11
Pluto      3.666e+11