Obs. : 2018-10-26
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.454e+11
Venus      3.503e+11
Earth      3.484e+11
Mars       3.469e+11
Jupiter    3.454e+11
Saturn     3.464e+11
Uranus     3.475e+11
Neptune    3.473e+11
Pluto      3.494e+11