... Most ground-based telescopes with lenses and mirrors are hindered by the Earth's nurturing, protective atmosphere that blurs images and scatters and absorbs light. But this telescope was designed to detect extreme gamma rays - photons with over 100 billion times the energy of visible light - and actually requires the atmosphere to operate. Voyager Views Titan s Haze . ... Halo of the Cat's Eye . ... The Cat's Eye Nebula (NGC 6543) is one of the best known planetary nebulae in the sky. ...