The Crescent Nebula (NGC 6888) is an emission nebula located in the constellation Cygnus, thousands of light-years from Earth. It was formed by the interaction between the fast stellar winds of a massive, dying star and the slower-moving material ejected during an earlier phase of its life.
This process has created a glowing, shell-like structure of ionized gas, giving the nebula its distinctive crescent-shaped appearance.
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