Obs. : 2025-09-16
Planet	Ly alpha (photons/cm^2/sec)
Mercury    7.675e+08
Venus      7.407e+08
Earth      8.058e+08
Mars       8.013e+08
Jupiter    7.640e+08
Saturn     7.940e+08
Uranus     7.713e+08
Neptune    7.940e+08
Pluto      8.476e+08