Obs. : 2018-09-07
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.172e+11
Venus      3.192e+11
Earth      3.286e+11
Mars       3.232e+11
Jupiter    3.230e+11
Saturn     3.239e+11
Uranus     3.318e+11
Neptune    3.241e+11
Pluto      3.220e+11