- Word History, Word Explorer
|part of speech:
||a cloud of dust or gas found between the stars. A nebula may seem either bright or dark, depending on how it reacts with light.
On a clear winter night, you can see a bright nebula in the constellation Orion.
is a Latin word that means "cloud or mist." It entered the English language in the 1500s as a term for the clouding of the eye we now call a "cataract." In the 1700s, "nebula" became a term in astronomy.