Obs. : 2018-04-11
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.534e+11
Venus      3.514e+11
Earth      3.501e+11
Mars       3.470e+11
Jupiter    3.501e+11
Saturn     3.470e+11
Uranus     3.538e+11
Neptune    3.512e+11
Pluto      3.470e+11