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Definition of the sun's "death"?
Hi:
I just don't understand why the expansion of the sun into a red giant would be classified as the sun's 'death'. As a red giant, the sun will very much be alive as it is today. It will burn helium instead of the hydrogen it burns today. My definition of the "death of the sun", is when the sun ceases its nuclear fusion. Fusion is what gives the sun its life. Best, Radium |
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Definition of the sun's "death"?
On Jul 13, 12:33 am, Radium wrote:
I just don't understand why the expansion of the sun into a red giant would be classified as the sun's 'death'. ... My definition of the "death of the sun", is when the sun ceases its nuclear fusion. I agree; it's sloppy terminology. A better term might be death throes. But even that I'd save for the truly terminal phase when the Sun creates a planetary nebula. The red-giant phase would better be called old age. Of course, stars continue to shine quite nicely even after nuclear fusion has stopped. I would call a white dwarf moribund rather than dead. |
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Definition of the sun's "death"?
Radium wrote:
Hi: I just don't understand why the expansion of the sun into a red giant would be classified as the sun's 'death'. As a red giant, the sun will very much be alive as it is today. It will burn helium instead of the hydrogen it burns today. I like "senescence". Big word, sounds good ;-) My definition of the "death of the sun", is when the sun ceases its nuclear fusion. Fusion is what gives the sun its life. Qualified in that "life of a star" sense, as opposed to biological life, I agree. Shawn |
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Definition of the sun's "death"?
On Fri, 13 Jul 2007 16:55:54 GMT, Sam Wormley
wrote: Fusion (after the radiation pressure of gravitational collapse) keeps the star inflated against gravity... eventually gravity wins! A fact that applies to people as well g. _________________________________________________ Chris L Peterson Cloudbait Observatory http://www.cloudbait.com |
#5
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Definition of the sun's "death"?
In article LADli.26938$Fc.8903@attbi_s21,
Sam Wormley wrote: snip Your book has an excellent diagram on page 459 relating the original star mass to that of the final core mass (core mass being the mass of whats left of the star at the end of its evolutionary processes). What book is that? I assume your posting was taken from class notes -- what course? -- Odysseus |
#6
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Definition of the sun's "death"?
In article , Odysseus wrote:
In article LADli.26938$Fc.8903@attbi_s21, Sam Wormley wrote: snip Your book has an excellent diagram on page 459 relating the original star mass to that of the final core mass (core mass being the mass of whats left of the star at the end of its evolutionary processes). What book is that? I assume your posting was taken from class notes -- what course? Glad I wasn't the only one wondering about this. I looked at the thread and other possibly related threads and couldn't work out what the reference to "your book" was all about. I'd like to find out as well. |
#7
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Definition of the sun's "death"?
In article , Odysseus wrote:
In article LADli.26938$Fc.8903@attbi_s21, Sam Wormley wrote: snip Your book has an excellent diagram on page 459 relating the original star mass to that of the final core mass (core mass being the mass of whats left of the star at the end of its evolutionary processes). What book is that? I assume your posting was taken from class notes -- what course? Google can be so useful sometimes. It's a direct quote from: http://edu-observatory.org/mcc/homew...19/homework.ch. 18-19.html |
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