Obs. : 2025-04-24
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.770e+08
Venus      8.775e+08
Earth      9.393e+08
Mars       8.903e+08
Jupiter    8.793e+08
Saturn     8.775e+08
Uranus     8.791e+08
Neptune    8.775e+08
Pluto      8.722e+08