Obs. : 2025-12-06
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.569e+08
Venus      8.851e+08
Earth      8.869e+08
Mars       8.932e+08
Jupiter    8.507e+08
Saturn     8.968e+08
Uranus     9.064e+08
Neptune    8.968e+08
Pluto      8.746e+08