Obs. : 2019-02-17
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.500e+11
Venus      3.528e+11
Earth      3.546e+11
Mars       3.428e+11
Jupiter    3.531e+11
Saturn     3.528e+11
Uranus     3.428e+11
Neptune    3.494e+11
Pluto      3.528e+11