Obs. : 2018-06-19
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.230e+11
Venus      3.257e+11
Earth      3.255e+11
Mars       3.206e+11
Jupiter    3.270e+11
Saturn     3.217e+11
Uranus     3.198e+11
Neptune    3.178e+11
Pluto      3.219e+11