The Sun forms and settles onto the main sequence

Assembled from 40 blocks · 1 evidence · 32 related

1. Story
2. A region of a molecular cloud collapsed, passed through a protostellar phase and reached the core temperature at which the proton-proton chain supplies the entire radiated luminosity. The age is inferred chiefly from radiometric dating of the oldest solar-system solids rather than from observation of the Sun itself, and the figure is usually quoted as about 4.6 billion years with the calcium-aluminium-rich inclusions in meteorites providing the anchor.
3. Knowledge
4. Giant molecular cloud
5. Protostar
6. Main sequence (core hydrogen burning)
7. The Sun
8. The Sun forms and settles onto the main sequence
9. Connections
10. The Sun
11. Giant molecular cloud
12. Protostar
13. Main sequence (core hydrogen burning)
14. Hydrogen fusion: the proton-proton chain and the CNO cycle
15. Main sequence (core hydrogen burning)
16. The Sun forms and settles onto the main sequence
17. Payne concludes that stars are mostly hydrogen - and disclaims it
18. Neutrinos from the solar CNO cycle are detected
19. Eagle Nebula (Messier 16) and the Pillars of Creation
20. Protostar
21. Planetary nebula
22. Supernova
23. The first stars form from metal-free gas
24. The Sun forms and settles onto the main sequence
25. Hubble photographs the Pillars of Creation
26. Initial stellar mass
27. Giant molecular cloud
28. Main sequence (core hydrogen burning)
29. The Sun forms and settles onto the main sequence
30. Hubble photographs the Pillars of Creation
31. Initial stellar mass
32. Protostar
33. Red giant and asymptotic giant branch
34. Hydrogen fusion: the proton-proton chain and the CNO cycle
35. The Sun
36. Hertzsprung-Russell diagram
37. The Sun forms and settles onto the main sequence
38. Hertzsprung and Russell independently plot luminosity against temperature
39. Evidence
40. Supports general stellar-physics statements in this pack: mass-luminosity scaling, main-sequence lifetimes, degeneracy support and the conventional 1.4 solar mass Chandrasekhar value. This is university-maintained educational reference material, not primary literature, and it was read via search summary rather than fetched. Primary citations should replace it for any figure a reader might quote.