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What are spiral nebulae? How did they get their name?

seo-qna
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Answer
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Hint: We need to understand the field of usage of the given term to know what they actually are and the reason for such a nomenclature. The cosmic study of galaxies to be discussed in order to find the solution which suits the given problem.

Complete answer:
The nebulae are large clusters of cloud and dust that usually exist beyond galaxies as independent entities. These giant clouds of dust and ionised gases can be formed as a result of a dying star which is small to form a black hole or are the origins of new stars.
There are many types of nebula depending on their structure, shape and composition. The nebulae which have dust particles and gases which have the ability to form celestial bodies can be called the planetary nebulas. Then, there exists, the emission nebulae, the reflection nebulae, the dark nebulae and the supernova remnants. The supernova remnants are the leftovers of small stars.
The spiral nebulae are clusters of dust and cloud found outside the milky way galaxy. They were primarily just thought to be dust and clouds, but there are recent arguments that say about them being galaxies. The spiral nebulae are named so because of their spiral nature of existence. The gaseous entity with dust and cloud tends to be in a spiral shape and thus they are named so.
This is the required solution for this problem.

Note:
The nebulae are seen by the astrophysicists with great enthusiasm. The different shapes and colours owned by these beautiful entities of ionised gases are always considered as a pool of knowledge about the universe which is not yet revealed.