The night sky over the Grand Teton National Park in Wyoming, USA. The bright summer Milky Way appears on the left in constellation Scorpius and Sagittarius. The green bands of active airglow (natural emission of the Earth upper atmosphere) scatters over the Tetons and the Jackson Lake Dam. The Teton Range is a part of the Rocky Mountains. The Grand Teton, the tallest mountain in the range, is 13,775 feet (4,199 m) high.