nebulae

As nouns the difference between nebulae and star

is that nebulae is (nebula) while star is star.

As a noun nebulae

is (nebula).

As a proper noun galaxy is

(astronomy|dated) the milky way galaxy, from when it was thought the universe (our universe) had only one galaxy.

As nouns the difference between aerosol and nebulae

is that aerosol is a liquid or solid composed of finely divided particles suspended in a gaseous medium while nebulae is irregular plural of nebula.

As nouns the difference between nebule and nebulae

is that nebule is (obsolete) a little cloud while nebulae is (nebula).

As nouns the difference between nebulas and nebulae

is that nebulas is while nebulae is (nebula).

As a noun nebulae

is irregular plural of nebula.

As an adjective nebular is

of or pertaining to a nebula.

Cosmicdust is likely misspelled.

Cosmicdust has no English definition.

As a noun nebulae is

irregular plural of nebula.

As nouns the difference between nebulae and nebula

is that nebulae is irregular plural of nebula while nebula is a cloud in outer space consisting of gas or dust (e.g. a cloud formed after a star explodes).