Just above and to the right of this photograph's center are the four stars that mark the boundaries of the famous Southern Cross . At the top of this constellation, also known as The Crux , is the orange star Gamma Crucis . The band of stars, dust, and gas crossing the middle of the photograph is part our Milky Way Galaxy . In the very center of the photograph is the dark Coal Sack Nebula , and the bright nebula on the far right is the Carina Nebula . The Southern Cross is such a famous constellation that it is depicted on the national flag of Australia .
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