which event signals the birth of a star?\na core shrinks and explodes in a supernova.\na protostar…
which event signals the birth of a star?\na core shrinks and explodes in a supernova.\na protostar collapses, becoming dense and hot.\nextreme heat and pressure causes nuclear fusion.\na mass of gas and dust grows and forms a protostar.
Answer
Brief Explanations:
The birth of a star occurs when extreme heat and pressure in a stellar - nebula cause nuclear fusion in the core. This is the key event that marks the start of a star's life cycle. A supernova is the death of a massive star. The formation of a protostar is an earlier stage in the process leading to star - birth.
Answer:
Extreme heat and pressure causes nuclear fusion.