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START THE FLOWCHART OF STELLAR EVOLUTION Is the mass of the protostar >0.1M ? No 1. What happens to this object? Yes 2. Where on the HR diagram is it? What is its energy source? 3. H core burning via what fusion process? No Is the mass of the star >~2M ? 6. What happens to the pressure and mass? Yes 9. H core burning via what fusion process? 10. Core runs out of H. What happens to the star (core,shell, and atmosphere? Name? 4. Core runs out of H. What happens to the star? What is it called? 5. What happens when core runs out of He? When does burning stop? 17. Stars lose mass throughout their lifetimes, by various processes. What happens to this lost material (gas,dust,etc)? 11. What happens when the core runs out of He? What does the core burn to? No Is the mass of the star >~6M ? Yes 12. What happens in the core? When does burning stop? 7. What is the gaseous object called? 13. Object becomes what? 15. What is this object called? Yes Is the object spinning & we can see flashes of radiation? 8. "Star" finally becomes what? 16. Object finally becomes what? Yes Is the mass of the "star" >~3M ? No 14. Object finally becomes what?