Obs. : 2020-02-28
Planet	Ly alpha (photons/cm^2/sec)
Mercury    6.240e+08
Venus      6.003e+08
Earth      6.097e+08
Mars       6.128e+08
Jupiter    6.173e+08
Saturn     6.201e+08
Uranus     5.926e+08
Neptune    6.198e+08
Pluto      6.173e+08