Obs. : 2018-06-04
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.888e+11
Venus      3.911e+11
Earth      3.913e+11
Mars       3.808e+11
Jupiter    3.913e+11
Saturn     3.849e+11
Uranus     3.885e+11
Neptune    3.778e+11
Pluto      3.825e+11