Obs. : 2025-09-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    7.734e+08
Venus      7.792e+08
Earth      8.946e+08
Mars       8.138e+08
Jupiter    8.195e+08
Saturn     8.946e+08
Uranus     8.421e+08
Neptune    8.879e+08
Pluto      9.077e+08