How does a star form from a nebula?

Answer 1

The nebula collapse into themselves, producing protostars, which in turn will become main sequence stars.

To be clear, stars can only form in two types of nebula: reflective and dark (both are interstellar clouds of gas and dust). Star formation starts when the denser parts of the cloud collapse due to gravity or self-weight, forming dust/gas cores that are typically 10^4 solar masses. Because the cores are now denser than the outer cloud, they collapse first (again).

The collapse of the cores produces clumps that eventually develop into protostars, which take approximately 10 million years to mature into stars.

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Answer 2

The process by which a star forms from a nebula is called stellar formation. It starts with the gravitational collapse of a dense region within the nebula called a molecular cloud. As the cloud contracts, it fragments into smaller clumps. Within these clumps, gravity keeps pulling matter inward, making the clumps even denser. Eventually, one of these clumps becomes dense enough and hot enough at its core to initiate nuclear fusion, the process that powers stars. This ignition signals the beginning of a star, as it starts to emit light and heat energy. Eventually, the star reaches a stable equilibrium between the inward pull of gravity and the outward push of radiation from nuclear fusion, turning it into a main-sequence star.

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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.

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.

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.

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.

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