Obs. : 2025-07-16
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.190e+08
Venus      8.260e+08
Earth      8.336e+08
Mars       8.153e+08
Jupiter    8.241e+08
Saturn     8.403e+08
Uranus     8.290e+08
Neptune    8.403e+08
Pluto      8.339e+08