Obs. : 2025-08-13
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.517e+08
Venus      8.524e+08
Earth      8.280e+08
Mars       8.470e+08
Jupiter    8.524e+08
Saturn     8.302e+08
Uranus     8.390e+08
Neptune    8.302e+08
Pluto      8.199e+08