Obs. : 2025-07-26
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.123e+08
Venus      8.006e+08
Earth      8.761e+08
Mars       8.250e+08
Jupiter    7.998e+08
Saturn     8.734e+08
Uranus     8.252e+08
Neptune    8.734e+08
Pluto      8.589e+08