Obs. : 2025-10-01
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.716e+08
Venus      9.090e+08
Earth      8.646e+08
Mars       8.459e+08
Jupiter    9.169e+08
Saturn     8.737e+08
Uranus     9.106e+08
Neptune    8.737e+08
Pluto      8.453e+08