Obs. : 2017-04-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.581e+11
Venus      3.601e+11
Earth      3.849e+11
Mars       3.604e+11
Jupiter    3.733e+11
Saturn     3.847e+11
Uranus     3.581e+11
Neptune    3.612e+11
Pluto      3.773e+11