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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
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process, physical process go
a sustained phenomenon or one marked by gradual changes through a series of states
a sustained phenomenon or one marked by gradual changes through a series of states
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nebula
an immense cloud of gas (mainly hydrogen) and dust in interstellar space
an immense cloud of gas (mainly hydrogen) and dust in interstellar space
noun.object
2 Subcategories
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diffuse nebula, gaseous nebula go
a cluster of stars within an intricate cloud of gas and dust
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planetary nebula go
a nebula that was once thought to be a star with its planets but is now thought to be a very hot star surrounded by an expanding envelope of ionized gases that emit a fluorescent glow because of intense radiation from the star