Future of our sun

Hi,

So far I know, the sun will become to a red giant in about 4 to 5 billion
jears. In an Article of the german version of "Scientific American"
("Spektrum der Wissenschaft") of october 2004 about the future of the earth
climate influenced by the development of the sun, they write that the sun
will become to a red giant in 7.8 billion years. Is that really the newest
and best estimation so far? What about the reliability of present computer
models of the sun? I would expect minor uncertainties as the difference
between 4-5 to 7.8 billion years.

Furthermore I am interested in additional data concerning the future time
dependence of primary parameters of our sun like diameter, power or surface
temperature. Who knows a paper or web site providing that?

Thank you for any comment!

--
Wolfgang Beyer
www.wolfgangbeyer.de

"WB" == Wolfgang Beyer writes:

WB Hi, So far I know, the sun will become to a red giant in about 4
WB to 5 billion jears. In an Article of the german version of
WB "Scientific American" ("Spektrum der Wissenschaft") of october
WB 2004 about the future of the earth climate influenced by the
WB development of the sun, they write that the sun will become to a
WB red giant in 7.8 billion years. Is that really the newest and best
WB estimation so far? What about the reliability of present computer
WB models of the sun? I would expect minor uncertainties as the
WB difference between 4-5 to 7.8 billion years.

WB Furthermore I am interested in additional data concerning the
WB future time dependence of primary parameters of our sun like
WB diameter, power or surface temperature. Who knows a paper or web
WB site providing that?

See

I.-J. Sackmann, A. I. Boothroyd, & K. E. Kraemer
1993, "Our Sun. III. Present and Future," ApJ, 418, 457
http://adsabs.harvard.edu/cgi-bin/np...pJ...418..457S

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Joseph Lazio wrote in message ...
"WB" == Wolfgang Beyer writes:

WB Hi, So far I know, the sun will become to a red giant in about 4
WB to 5 billion jears. In an Article of the german version of
WB "Scientific American" ("Spektrum der Wissenschaft") of october
WB 2004 about the future of the earth climate influenced by the
WB development of the sun, they write that the sun will become to a
WB red giant in 7.8 billion years. Is that really the newest and best
WB estimation so far? What about the reliability of present computer
WB models of the sun? I would expect minor uncertainties as the
WB difference between 4-5 to 7.8 billion years.

WB Furthermore I am interested in additional data concerning the
WB future time dependence of primary parameters of our sun like
WB diameter, power or surface temperature. Who knows a paper or web
WB site providing that?

See

I.-J. Sackmann, A. I. Boothroyd, & K. E. Kraemer
1993, "Our Sun. III. Present and Future," ApJ, 418, 457
http://adsabs.harvard.edu/cgi-bin/np...pJ...418..457S

Hi, any chance for Jupiter being "initiated" into a star?

http://puck.dhs.org/iau

"Aht" == Astronomy=Astrology http://neodruid tk writes:

Aht any chance for Jupiter being "initiated" into a star?

Only if you increase its mass by about a factor of 10.

--
Lt. Lazio, HTML police | e-mail:
No means no, stop rape. | http://patriot.net/%7Ejlazio/
sci.astro FAQ at http://sciastro.astronomy.net/sci.astro.html

See

I.-J. Sackmann, A. I. Boothroyd, & K. E. Kraemer
1993, "Our Sun. III. Present and Future," ApJ, 418, 457
http://adsabs.harvard.edu/cgi-bin/np...pJ...418..457S

Thanks a lot! This seems to contain precise answers to all my questions!

--
Wolfgang Beyer
www.wolfgangbeyer.de