Obs. : 2019-08-07
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.484e+11
Venus      3.505e+11
Earth      3.504e+11
Mars       3.498e+11
Jupiter    3.406e+11
Saturn     3.476e+11
Uranus     3.679e+11
Neptune    3.578e+11
Pluto      3.462e+11