(See description below)
North America Nebula and Pelican Nebula
The emission nebula on the left is famous partly because it resembles Earth's continent of North America. To the right of the North America Nebula, cataloged as NGC 7000, is a less luminous nebula that resembles a pelican. The two emission nebulae measure about 50 light-years across, are located about 1500 light-years away, and are separated by a dark absorption cloud.
This image captures, in false color—green for hydrogen emission, blue for oxygen, and red for sulfer. The nebulae can be seen with binoculars from a dark location. Look for a small nebular patch north-east of bright star Deneb in the constellation of Cygnus.
It is still unknown which star or stars ionize the red-glowing hydrogen gas.