Obs. : 2026-09-19
Planet	Ly alpha (photons/cm^2/sec)
Mercury    7.150e+08
Venus      7.160e+08
Earth      7.644e+08
Mars       7.758e+08
Jupiter    7.636e+08
Saturn     7.693e+08
Uranus     7.774e+08
Neptune    7.693e+08
Pluto      7.534e+08