Obs. : 2018-03-19
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.593e+11
Venus      3.593e+11
Earth      3.507e+11
Mars       3.504e+11
Jupiter    3.513e+11
Saturn     3.504e+11
Uranus     3.593e+11
Neptune    3.618e+11
Pluto      3.503e+11