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What is a nebula? How does it form a protostar?

Answer 1

A nebula is a cloud of gas and dust which can be millions of light years in diameter

When gas and dust in a nebula begin to condense, their gravitational pull increases with mass, causing more and more condensation, which results in the formation of a pre main sequence star where nuclear fusion begins. This is how protostars are created.

After that, it develops into a main sequence star, with distinct consequences depending on the star's mass.

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Answer 2

John Alexander

An enormous cloud of gas and dust in space, a nebula eventually forms a protostar through a process known as gravitational collapse, in which the gas and dust particles within the nebula are drawn together by gravity, heat up as a result of the increasing pressure, and eventually reach a point where nuclear fusion ignites, forming a protostar.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.