M16: Nebula With Star Cluster . ... Credit Copyright: Anglo-Australian Telescope Board Explanation: The photogenic M 16 shown above is composed of a young star cluster associated with a spectacular emission nebulae lined with clouds of interstellar dust . ... The dust absorbs so much light it allows astronomers to determine which stars are inside the nebula and which are in the foreground. Stars are forming within the nebula, also known as the Eagle Nebula . ... NASA Official: Jay Norris. ...