Nebula adjectives are listed in this post. Each word below can often be found in front of the noun nebula in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing NEBULA.
great, original
orion, planetary
primitive, solar
spiral
Hope this word list had the adjective used with nebula you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.
DENSE