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protostar

Explanation:

A protostar is the earliest stage of a star's life. A star is born when the gas and dust from a nebula become so hot that nuclear fusion starts. Once a star has “turned on” it is known as a main sequence star.

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A star goes through different stages during its life, begining with nebula as a protostar. The earliest stage of a star is called a protostar.

What is a star cycle?

The star cycle is the sequence of changes that a star undergoes throughout its existence.

The evolutive stages of an average star include

  • Nebula,
  • Protostar,
  • Main sequence,
  • Subgiant,
  • Red giant,
  • White dwarf.

Nebula and protostar are the earliest stage in the star cycle.

Stars are born from the nebula that is the dust and gas particles condensation due to gravity effect in the interstellar clouds.

The Protostar is an advanced level of condensation of the dust and gas particles. It is the nuclear fusion stage.

According to the resumed framework, the earliest stage of a

is called a protostar.

You can learn more about protostars at

https://brainly.com/question/10019938

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