Obs. : 2025-06-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.216e+08
Venus      8.080e+08
Earth      7.932e+08
Mars       8.191e+08
Jupiter    8.192e+08
Saturn     8.003e+08
Uranus     8.106e+08
Neptune    8.003e+08
Pluto      7.961e+08