Obs. : 2025-04-21
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.766e+08
Venus      8.758e+08
Earth      9.048e+08
Mars       8.902e+08
Jupiter    8.774e+08
Saturn     8.758e+08
Uranus     8.721e+08
Neptune    8.758e+08
Pluto      8.640e+08