Obs. : 2025-04-25
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.664e+08
Venus      8.690e+08
Earth      9.302e+08
Mars       8.748e+08
Jupiter    8.688e+08
Saturn     8.690e+08
Uranus     8.723e+08
Neptune    8.690e+08
Pluto      8.778e+08