Nebulas are vast, celestial objects that are typically made up of gas and dust. They are important areas of study for astronomers and space enthusiasts alike, as they provide insight into the formation of stars and galaxies. Neighboring synonyms for "nebulas" include "clouds," "mists," and "haze." Other options include "plumes," "veils," and "fogs," which all give an indication of the nebulous and misty appearance of these objects. Furthermore, "gaseous regions" and "stellar nurseries" may be used to describe the space where nebulas appear, emphasizing their role in the creation of new celestial bodies.