Obs. : 2025-04-08
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.886e+08
Venus      8.886e+08
Earth      8.496e+08
Mars       8.461e+08
Jupiter    8.417e+08
Saturn     8.886e+08
Uranus     8.453e+08
Neptune    8.886e+08
Pluto      8.528e+08