aerial aeroplane airplane Alice-Springs angles appearance arial below celestial-impact central-Australia crater distance distant expanse flying formations from-above geologically-significant Gosse-Bluff height high impact-crater isolated landscape looking-down massive mountainous movement moving Northern-Territory outback panoramic-views remote rough rugged rural scenery scenic shadows sightseeing sparse sunlight sunshine terrain Tnorala travel travelling undulating vegetation arid aridity brine brine-lake bushland country-side dry-salt-crust extensive huge Lake-Amadeus panoramic Pantu plain saline saline-lakes salt-lake salt-lakes-chain saltpans