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Lecture 18

Lecture 18

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Department
Origins
Course
ORIGINS 2B03
Professor
Laura Parker
Semester
Fall

Description
Lecture 18Tuesday October 25 20111230 PMThe suns energy source is from hydrogen fusion pp chainThis converts hydrogen into helium plus energy Our sun can only burn till carbonThe more massive an object the hotter it is the bigger element it can burn up to ironLow mass star shedding matter into spaceplanetary nebula lasts 10K yearsWhat is left is a white dwarfThe suns pressure pushing outwards gets stronger since He is being burned compared to gravityRecap final stages of a lowmass starThe star becomes big and bright1The star loses massgently2Out layers of material are ejected into the interstellar medium forming a planetary nebulaA small hot core is left behind White dwarfThe star becomes a white dwarfBurnout core about the size of the ear
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