Obs. : 2017-12-16
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.335e+11
Venus      3.335e+11
Earth      3.465e+11
Mars       3.261e+11
Jupiter    3.276e+11
Saturn     3.415e+11
Uranus     3.472e+11
Neptune    3.488e+11
Pluto      3.433e+11