A Space & astronomy forum. SpaceBanter.com

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » SpaceBanter.com forum » Others » Misc
Site Map Home Authors List Search Today's Posts Mark Forums Read Web Partners

Life expectany of the sun



 
 
Thread Tools Display Modes
  #1  
Old July 6th 03, 11:44 AM
Carusus
external usenet poster
 
Posts: n/a
Default Life expectany of the sun

A friend who is normally reliable, tells me he read an article in Scientific
American recently about the temperature of the sun's corona in which it was
stated that the sun's life expectancy was far shorter than we first
thought - about one million years (I suspect he may have got that bit wrong)
Anyone know this article?
Thanks


Ads
  #2  
Old July 6th 03, 02:28 PM
Bill Nunnelee
external usenet poster
 
Posts: n/a
Default Life expectany of the sun

The sun is still thought to be about halfway through it's 10 billion year
life cycle. What's changed (or at least better understood) is that its
temperature is gradually increasing throughout the time it spends on the
main sequence. Well before it evolves into a red giant, this more gradual
warming is expected to trigger a runaway greenhouse effect on the earth,
turning it into another Venus. So instead of having 5 billion years left,
we may have 1 billion. (I suspect your friend remembered that part wrong
and thought they said million.)


"Carusus" wrote in message
...
A friend who is normally reliable, tells me he read an article in

Scientific
American recently about the temperature of the sun's corona in which it

was
stated that the sun's life expectancy was far shorter than we first
thought - about one million years (I suspect he may have got that bit

wrong)
Anyone know this article?
Thanks





 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Breakthrough in Cosmology Kazmer Ujvarosy Astronomy Misc 3 May 22nd 04 08:07 AM
Breakthrough in Cosmology Kazmer Ujvarosy Amateur Astronomy 4 May 21st 04 11:44 PM
Breakthrough in Cosmology Kazmer Ujvarosy Space Station 0 May 21st 04 08:02 AM
Breakthrough in Cosmology Kazmer Ujvarosy Policy 0 May 21st 04 08:00 AM


All times are GMT +1. The time now is 08:02 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright 2004-2019 SpaceBanter.com.
The comments are property of their posters.