What does it mean to dream about nebula?
A nebula often stands for something forming out of the unformed, a beauty and possibility that has not yet taken shape.
Four ways to read it
Each reading below comes from a named tradition and a cited source, so you can see where it came from and decide what fits your dream.
Freud
Freud would look at the glowing cloud as a wish or idea still vague and unmade, beautiful in its haze. A nebula can stand for a potential not yet brought to form. Its softness is part of the meaning.
After Freud, The Interpretation of Dreams (Brill trans., 1913), public domain.Jung
Jung might see the nebula as the creative matrix, the formless ground from which new things are born. It can mark a stage of becoming before clear shape arrives. The cloud holds what is still to come.
Jungian concept (our summary).Modern
Continuity ties a nebula to waking thoughts of beginnings, beauty, or ideas still taking form. It often follows a stretch of open wondering. The glowing cloud mirrors that unsettled, hopeful state.
Continuity hypothesis (our summary).Mythological
The shining clouds among the stars were folded into the old pictures of a heaven full of life and making, the stuff from which worlds came. They marked the sky as a place of creation. They stood for the formless before form.
Rosmerta Publishing editorial synthesis (after Bulfinch; Brewer).