Obs. : 2025-06-18
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.302e+08
Venus      8.065e+08
Earth      8.092e+08
Mars       8.290e+08
Jupiter    8.263e+08
Saturn     8.056e+08
Uranus     8.126e+08
Neptune    8.056e+08
Pluto      8.088e+08