Obs. : 2015-04-16
Planet	Ly alpha (photons/cm^2/sec)
Mercury    4.654e+11
Venus      4.600e+11
Earth      4.900e+11
Mars       4.633e+11
Jupiter    4.444e+11
Saturn     5.013e+11
Uranus     4.700e+11
Neptune    4.803e+11
Pluto      5.101e+11