The summer Milky Way appears dazzling over a road in the Yellowstone National Park, a World Heritage Site in Wyoming, USA. The three bright stars of the Summer Triangle (Vega, Altair, and Deneb) are on the upper middle. At the tail of constellation Cygnus, the celestial Swan, next to bright star Deneb (the upper corner of the triangle) is a red cloud known as the North America Nebula.