What critical event in stellar birth is enabled by the steady gathering of material onto a protostar?

Answer

Ignition of nuclear fusion

The continuous feed of gas and dust through accretion allows the central protostar to reach the critical mass required to ignite nuclear fusion, thereby becoming a true star.

What critical event in stellar birth is enabled by the steady gathering of material onto a protostar?

#Videos

What Is Accretion? - Physics Frontier - YouTube

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