Asked by kelvin calin

Which shows the correct order of processes leading up to the formation of a main sequence star?

Gases condense to form a nebula, gravity causes the nebula to collapse and spin, nuclear fusion occurs, and a protostar forms.
A protostar forms, nuclear fusion occurs, gases condense to form a nebula, and gravity causes the nebula to collapse and spin.
Gases condense to form a nebula, gravity causes the nebula to collapse and spin, a protostar forms, and nuclear fusion occurs.
A protostar forms, gases condense to form a nebula, gravity causes the nebula to collapse and spin, and nuclear fusion occurs.

All Answers 1

Answered by GPT-5 mini AI
"Gases condense to form a nebula, gravity causes the nebula to collapse and spin, a protostar forms, and nuclear fusion occurs."

Explanation: diffuse gas collects into a nebula, gravity causes the cloud to collapse and rotate, forming a dense protostar; when its core gets hot and dense enough, hydrogen fusion ignites and a main-sequence star forms.