Obs. : 2018-03-17
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.465e+11
Venus      3.465e+11
Earth      3.406e+11
Mars       3.412e+11
Jupiter    3.424e+11
Saturn     3.412e+11
Uranus     3.465e+11
Neptune    3.478e+11
Pluto      3.409e+11