Obs. : 2026-09-17
Planet	Ly alpha (photons/cm^2/sec)
Mercury    7.006e+08
Venus      7.100e+08
Earth      7.592e+08
Mars       7.606e+08
Jupiter    7.443e+08
Saturn     7.704e+08
Uranus     7.690e+08
Neptune    7.667e+08
Pluto      7.546e+08