Question

How is a nebula classified?

Answer 1

Answer:

Stellar objects that can be called Nebula come in four major classes. Most fall into the category of Diffuse Nebulae, which means they have no well-defined boundaries. These can be subdivided into two further categories based on their behavior with visible light – “Emission Nebulae” and “Reflection Nebulae”.

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Answer 2

Answer:

here you go friend, hope it helps, please mark it the brainliest..

Explanation:

Nebula come in four major classes.

Most of them just fall into the category of Diffuse Nebulae, it means they don't have no well-defined boundaries...

These can be again be subdivided into two further categories i.e based on their behavior with visible light – “Emission Nebulae”

and

“Reflection Nebulae”