Obs. : 2025-05-23
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.032e+08
Venus      7.995e+08
Earth      8.200e+08
Mars       7.994e+08
Jupiter    8.115e+08
Saturn     8.015e+08
Uranus     8.032e+08
Neptune    8.015e+08
Pluto      8.162e+08