Obs. : 2018-04-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.513e+11
Venus      3.497e+11
Earth      3.459e+11
Mars       3.486e+11
Jupiter    3.466e+11
Saturn     3.500e+11
Uranus     3.524e+11
Neptune    3.490e+11
Pluto      3.486e+11