Obs. : 2025-04-17
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.449e+08
Venus      8.474e+08
Earth      8.391e+08
Mars       8.673e+08
Jupiter    8.674e+08
Saturn     8.474e+08
Uranus     8.639e+08
Neptune    8.449e+08
Pluto      8.384e+08