The Milky Way in Cygnus. Red areas are emission nebulae, where hydrogen is excited by ultraviolet light from hot stars. The one near Deneb, the brightest star, is called the w:North America Nebula for its shape.
A faint w:curlicue in the lower part is a supernova remnant known as the Veil Nebula.
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The Milky Way in Cygnus. Red areas are emission nebulae, where hydrogen is excited by ultraviolet light from hot stars. The one near Deneb, the brightest star, is called the North American Nebula for its shape. A faint curilicue in the lower part is a su
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