Obs. : 2018-04-04
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.539e+11
Venus      3.457e+11
Earth      3.496e+11
Mars       3.540e+11
Jupiter    3.511e+11
Saturn     3.540e+11
Uranus     3.496e+11
Neptune    3.526e+11
Pluto      3.512e+11