Obs. : 2015-04-04
Planet	Ly alpha (photons/cm^2/sec)
Mercury    4.997e+11
Venus      5.385e+11
Earth      4.888e+11
Mars       5.264e+11
Jupiter    5.015e+11
Saturn     4.831e+11
Uranus     5.083e+11
Neptune    4.774e+11
Pluto      4.687e+11