Exam 19: Stellar Evolution: on and After the Main Sequence

When a protostar evolves to the point where it begins steady hydrogen fusion in its core and first achieves hydrostatic equilibrium, it is called:

Population I stars are metal rich. Where did these metals come from?

The Pauli exclusion principle, describing the quantum states of particles, stipulates that no two identical particles (such as electrons) can:

Within the deep interior of the Sun, which development will eventually lead to major changes as the Sun evolves off the main sequence toward the red giant phase of its life?