Obs. : 2018-05-09
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.955e+11
Venus      3.868e+11
Earth      3.939e+11
Mars       4.065e+11
Jupiter    3.939e+11
Saturn     4.013e+11
Uranus     3.955e+11
Neptune    4.020e+11
Pluto      4.065e+11