Question

What is a nebula?

the core of a massive star
a cloud of gas and dust in space
a swirling disk with a lot of gravity
the debris remaining after a supernova

Answer 1

Answer

Above is a picture of Nebula..

a cloud of dust and gas in space

Answer 2

A nebula can be defined as: B. a cloud of gas and dust in space.

What is a nebula?

A nebula can be defined as a cloud of gas and dust in space.

This ultimately implies that, a nebula is a low-density cloud of interstellar hot gas and dust such as:

• Helium

• Hydrogen

Basically, a nebula is needed for the creation or formation of a star as follows:

1. An increase in the temperature at the center of a nebula causes the small nuclei of atoms to fuse.
2. The nebula gets hotter and brighter as the nuclear fusion sets off a chain reaction while providing enough energy to turn the nebula into a star.

Read more on nebula here: https://brainly.com/question/19530940