Obs. : 2025-08-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.274e+08
Venus      8.511e+08
Earth      7.891e+08
Mars       7.832e+08
Jupiter    8.511e+08
Saturn     8.146e+08
Uranus     8.756e+08
Neptune    8.146e+08
Pluto      7.614e+08