Obs. : 2026-04-29
Planet	Ly alpha (photons/cm^2/sec)
Mercury    7.614e+08
Venus      7.652e+08
Earth      8.086e+08
Mars       7.614e+08
Jupiter    7.340e+08
Saturn     7.755e+08
Uranus     7.652e+08
Neptune    7.755e+08
Pluto      8.216e+08