Obs. : 2025-02-18
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.979e+08
Venus      8.519e+08
Earth      9.424e+08
Mars       9.604e+08
Jupiter    8.961e+08
Saturn     8.751e+08
Uranus     8.740e+08
Neptune    8.751e+08
Pluto      9.200e+08