Obs. : 2018-06-09
Planet	Ly alpha (photons/cm^2/sec)
Mercury    4.000e+11
Venus      3.982e+11
Earth      3.972e+11
Mars       3.863e+11
Jupiter    3.997e+11
Saturn     3.894e+11
Uranus     3.888e+11
Neptune    3.852e+11
Pluto      3.880e+11