What is the meaning of Nebula?

A cloud in outer space consisting of gas or dust (e.g. a cloud formed after a star explodes).

A white spot or slight opacity of the cornea.

A cloudy appearance in the urine.

Synonym of tähtisumu

fog, mist, haze

nebula

fog, mist; cloud

nebula

fog

cloud

vapor

nebula

Source: wiktionary.org