Obs. : 2025-07-27
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.222e+08
Venus      7.963e+08
Earth      8.723e+08
Mars       8.281e+08
Jupiter    7.980e+08
Saturn     8.655e+08
Uranus     8.151e+08
Neptune    8.655e+08
Pluto      8.674e+08