How does a star's life begin?

Answer 1

A star begins its life as a cloud of dust and gas (mainly hydrogen) known as a nebula.

When a nebula's dust and gas gather together due to gravity, a process known as accretion forms a prostate. If the prostate's core temperature is raised to a critical point, nuclear fusion will start and a star will be born.

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Answer 2

Alexander Acosta

The gravitational collapse of a region within a molecular cloud is the first stage of a star's life. This collapse can be caused by a variety of events, such as the shock wave from a nearby supernova or the collision of two molecular clouds. The cloud collapses into smaller clumps, each of which forms a protostar, which then continues to accrete material from its surrounding disk until nuclear fusion ignites in its core, signaling the start of the star's main sequence.

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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.