Obs. : 2025-04-30
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.406e+08
Venus      8.505e+08
Earth      8.329e+08
Mars       8.169e+08
Jupiter    8.253e+08
Saturn     8.505e+08
Uranus     8.312e+08
Neptune    8.505e+08
Pluto      8.434e+08