Obs. : 2025-09-23
Planet	Ly alpha (photons/cm^2/sec)
Mercury    7.927e+08
Venus      8.047e+08
Earth      9.130e+08
Mars       7.975e+08
Jupiter    8.503e+08
Saturn     9.177e+08
Uranus     9.044e+08
Neptune    9.177e+08
Pluto      8.930e+08