Obs. : 2018-09-27
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.845e+11
Venus      3.878e+11
Earth      3.961e+11
Mars       3.886e+11
Jupiter    3.872e+11
Saturn     3.925e+11
Uranus     3.961e+11
Neptune    3.888e+11
Pluto      3.910e+11