Term
| how do interstellar clouds collapse |
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Definition
| they cannot resist the gravitational contraction |
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Term
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Definition
| a molecular cloud fragment heats up and spins faster as gravity makes it contract, producing a rapidly rotating protostar at its center |
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Term
| Red Giant Stage (main sequence) |
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Definition
| sun's next phase, after fusion stops, core will shrink, sun will grow in size and luminosity |
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Term
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Definition
| "failed star" because they never get hot enough for efficient hydrogen fusion |
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Term
| when does a protostar become a main sequence star? |
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Definition
| when it achieves energy balance between hydrogen fusion in its core and radiation from its surface |
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Term
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Definition
| cold and dense clouds which stars are formed in. |
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Term
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Definition
| hydrogen fusion in a shell around the core. (cause of greater luminosity) |
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Term
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Definition
| drastic rate in He fusion that stops core shrinkage and the sun will become smaller and less luminous that it was as a red giant |
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Term
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Definition
| main sequence--> red giant--> helium core-fusion star--> double shell-fusion star--> planetary nebula--> white dwarf |
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Term
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Definition
| the outer layers of the star that are ejected into space |
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Term
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Definition
| what is left behind when a star dies (carbon core) |
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Term
| CNO Cycle VS. Proton-proton chain |
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Definition
| cno cycle allows hydrogen fusion to proceed at a much faster rate than would be possible by the rot on proton chain |
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Term
| Which stars create the elements on earth |
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Definition
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Term
| What is the most important parameter |
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Definition
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