Obs. : 2025-02-19
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.820e+08
Venus      8.509e+08
Earth      9.302e+08
Mars       9.682e+08
Jupiter    9.201e+08
Saturn     8.604e+08
Uranus     9.029e+08
Neptune    8.604e+08
Pluto      9.112e+08