which event signals the birth of a star? a core shrinks and explodes in a supernova. a protostar collapses…
which event signals the birth of a star? a core shrinks and explodes in a supernova. a protostar collapses, becoming dense and hot. extreme heat and pressure causes nuclear fusion. a mass of gas and dust grows and forms a protostar.
Answer
Brief Explanations:
The birth of a star occurs when the extreme heat and pressure in its core initiate nuclear fusion, converting hydrogen into helium and releasing energy. A supernova is related to the death of a massive star. The formation of a protostar is an earlier - stage process in star - formation, and the collapse of a protostar is part of the pre - fusion development.
Answer:
Extreme heat and pressure causes nuclear fusion.