Obs. : 2017-09-07
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.896e+11
Venus      3.883e+11
Earth      3.940e+11
Mars       3.917e+11
Jupiter    4.110e+11
Saturn     4.228e+11
Uranus     3.906e+11
Neptune    4.158e+11
Pluto      4.343e+11