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Explanation:This snapshotfrom theInternational Space Stationwas taken on August 11while orbiting about 430 kilometersabove the Indian Ocean, Southern Hemisphere,planet Earth.The spectacular view looks south and east,down toward the planet's horizon and through red and greencurtains ofaurora australis.The auroral glow is caused by emission from excited oxygenatoms in the extremely rarefiedupper atmospherestill present at the level of the orbiting outpost.Green emission from atomic oxygen dominates this sceneat altitudes of 100 to 250 kilometers, while red emissionfrom atomic oxygen can extend as high as 500 kilometers altitude.Beyond the glow of these southern lights, this viewfrom low Earth orbit reveals the starry sky from a southernhemisphere perspective.Stars in Orion's belt and the Orion Nebula are near the Earth's limbjust left of center.Sirius, alpha star ofCanis Majorand brightest star in planet Earth'snight is above centeralong the right edge of the southern orbital skyscape.