Arrange the following stars in order of their evolution: Youngest to oldest: .B:

Question

Arrange the following stars in order of their evolution:

Youngest to oldest:

.B: A star of uniform composition from center to surface; it contains hydrogen but has no nuclear reactions going on in the core.

C: A star that is fusing hydrogen to form helium in its core.

D: A star that is fusing helium to carbon in the core and hydrogen to helium in a shell around the core.

E: A star that has no nuclear reactions going on in the core but is fusing hydrogen to form helium in a shell around the core.

A: A star with no nuclear reactions going on in the core, which is made primarily of carbon and oxygen

Explanation / Answer

?STAR ?B. uniform composition and no reaction means that it is a PROTOSTAR. STAR C .hydrogen fused into helium in the core means it is a MAIN SEQUENCE STAR. STAR E.hydrogen fusion in a shell around a dormant core means it is an ORANGE GAINT. STAR D.helium fusion in the core and hydrogen fusion in the shell means it is a RED GAINT. STAR A.a core entirely of carbon and oxygen means that it is at THE END OF THE RED GAINT STAGE .

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