Obs. : 2023-04-16
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.989e+08
Venus      8.951e+08
Earth      9.150e+08
Mars       8.943e+08
Jupiter    9.145e+08
Saturn     9.309e+08
Uranus     8.989e+08
Neptune    9.337e+08
Pluto      9.102e+08