Obs. : 2026-09-18
Planet	Ly alpha (photons/cm^2/sec)
Mercury    7.023e+08
Venus      7.036e+08
Earth      7.547e+08
Mars       7.642e+08
Jupiter    7.509e+08
Saturn     7.684e+08
Uranus     7.720e+08
Neptune    7.625e+08
Pluto      7.502e+08