Obs. : 2025-09-29
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.381e+08
Venus      9.051e+08
Earth      9.086e+08
Mars       8.224e+08
Jupiter    9.343e+08
Saturn     9.135e+08
Uranus     9.288e+08
Neptune    9.135e+08
Pluto      8.693e+08