Obs. : 2017-01-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    2.990e+11
Venus      3.064e+11
Earth      3.169e+11
Mars       3.064e+11
Jupiter    3.088e+11
Saturn     2.984e+11
Uranus     3.078e+11
Neptune    3.042e+11
Pluto      3.008e+11