Compact nebulae are dense regions of gas and dust in space, often associated with the formation of new stars. They are typically smaller and more concentrated than other types of nebulae, making them important for studying stellar evolution. Compact nebulae can be found in various stages of development, from the early phases of star formation to the remnants of stars that have exploded. These nebulae are often observed in the vicinity of young, massive stars, which emit intense radiation that can illuminate and shape the surrounding material. Examples of compact nebulae include the Orion Nebula and the Eagle Nebula, both of which are key sites for understanding how stars and planetary systems form.