NGC 2237 is a bright emission nebula located in the constellation of Monoceros, also known as the Unicorn. It is part of a larger complex of gas and dust known as the Rosette Nebula, which is approximately 4,500 light-years away from Earth. The nebula is notable for its star-forming regions, where new stars are born from the surrounding material. The nebula spans about 50 light-years across and is characterized by its intricate structure and vibrant colors, primarily due to the ionization of hydrogen gas by nearby young stars. NGC 2237 is often studied by astronomers to understand the processes of star formation and the dynamics of interstellar matter.