Obs. : 2026-06-28
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.313e+08
Venus      8.385e+08
Earth      8.629e+08
Mars       7.735e+08
Jupiter    8.313e+08
Saturn     7.901e+08
Uranus     7.735e+08
Neptune    8.062e+08
Pluto      8.629e+08