Obs. : 2019-01-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.498e+11
Venus      3.420e+11
Earth      3.499e+11
Mars       3.568e+11
Jupiter    3.420e+11
Saturn     3.458e+11
Uranus     3.557e+11
Neptune    3.585e+11
Pluto      3.498e+11