The night sky over the Grand Teton national Park in Wyoming, USA. 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. A very strong and rare airglow activity appears in the sky. Airglow is the natural emission from the Earth upper atmosphere in green and red-yellow bands and wave like forms that appear faint and colorless to human eyes under dark skies. bright star Spica and the rest of the constellation Virgo are on the left.