Obs. : 2017-08-04
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.445e+11
Venus      3.470e+11
Earth      3.664e+11
Mars       3.411e+11
Jupiter    3.659e+11
Saturn     3.723e+11
Uranus     3.477e+11
Neptune    3.546e+11
Pluto      3.676e+11