Obs. : 2017-02-14
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.470e+11
Venus      3.682e+11
Earth      3.614e+11
Mars       3.688e+11
Jupiter    3.497e+11
Saturn     3.340e+11
Uranus     3.688e+11
Neptune    3.629e+11
Pluto      3.357e+11