nebula
noun1718{ds||1||}
- any of numerous clouds of gas or dust in interstellar space
- galaxy; especially : a galaxy other than the Milky Way galaxy —not used technically
planetary nebula
noun
planetary nebula
\
1785
- a usually compact luminous ring-shaped nebula that is composed of matter which has been ejected from a hot star at its center
spiral galaxy
noun
spiral galaxy
\
1913
- a galaxy exhibiting a central nucleus or barred structure from which extend curved arms of higher luminosity —called also spiral nebula
Powered by Merriam-Webster