Obs. : 2025-04-13
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.662e+08
Venus      8.552e+08
Earth      8.453e+08
Mars       8.310e+08
Jupiter    8.513e+08
Saturn     8.662e+08
Uranus     8.627e+08
Neptune    8.662e+08
Pluto      8.293e+08