Obs. : 2025-04-19
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.643e+08
Venus      8.675e+08
Earth      8.626e+08
Mars       8.926e+08
Jupiter    8.747e+08
Saturn     8.675e+08
Uranus     8.723e+08
Neptune    8.675e+08
Pluto      8.546e+08