What must occur for an object to be considered a main sequence star?
A) Hydrostatic equilibrium
B) Nuclear fusion reaction in the core
C) Protostar life begins
D) Both a and

Name: What must occur for an object to be considered a main sequence star? A) Hydrostatic equilibrium B) Nuclear fusion reaction in the core C) Protostar life begins D) Both a and
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Both hydrostatic equilibrium and nuclear fusion reaction in the core are necessary for an object to be considered a main sequence star.

What Must Occur for an Object to Be Considered a Main