Obs. : 2025-08-18
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.212e+08
Venus      8.206e+08
Earth      7.787e+08
Mars       8.088e+08
Jupiter    8.206e+08
Saturn     7.928e+08
Uranus     8.159e+08
Neptune    7.928e+08
Pluto      7.714e+08