Welcome to Astronomy & Telescope Astronomy

 
 

  Modules

· Home
· AvantGo
· Content
· Downloads
· Encyclopedia
· FAQ
· Feedback
· Forums
· Journal
· Members List
· Private Messages
· Recommend Us
· Reviews
· Search
· Statistics
· Stories Archive
· Submit News
· Surveys
· Top 10
· Topics
· Web Links
· Your Account
 

  Who's Online

There are currently, 8 guest(s) and 0 member(s) that are online.

You are Anonymous user. You can register for free by clicking here
 

  Search



 

  Languages

Select Interface Language:

 

  Random Headlines


Through Telescope
[ Through Telescope ]

·Astronomy: Universe - OUR VIEW OF THE UNIVERSE
·Astronomy: Through Telescope - ZOOMING IN
·Astronomy: Through Telescope - Moon-SHOOTING THE MOON
·Astronomy: Through Telescope - DEEP-SKY OBJECTS
·Astronomy: Through Telescope
 

 
  Sun Structure: Astronomy: Sun Structure - THE FUTURE OF OUR STAR
Posted on Friday, December 10 @ 18:47:01 CST by astronomy
 
 
  Sun Structure

THE FUTURE OF OUR STAR

Astronomers predict the future of the Sun by looking at what has happened to similar stars. Its life is now about half over. As it consumes hydrogen in its core, leaving an "ash" of helium behind, the Sun will grow hotter and brighter.

When its hydrogen begins to run
low, about five billion years from now, the Sun will grow into a red giant, expanding its diameter a hundredfold and swallowing the planet Mercury in the process.

The Sun will spend a few hundred million years as a red giant. Then, as nuclear reactions in its core start to sporadically fuse the helium "ash" into carbon, the Sun may begin to pulsate like the variable star Mira. Finally, as it exhausts its reserves, the Sun will throw off its outer layers to form a planetary nebula. This shell of gas will endure for a few tens of thousands of years before it dissipates into space. Eeft behind will be the white-hot core of the Sun, a white dwarf that will slowly cool and fade over billions of years.

 
 
  Login

Nickname

Password

Don't have an account yet? You can create one. As a registered user you have some advantages like theme manager, comments configuration and post comments with your name.
 

  Related Links

· More about Sun Structure
· News by astronomy


Most read story about Sun Structure:
Astronomy: Sun Structure

 

  Article Rating

Average Score: 0
Votes: 0

Please take a second and vote for this article:

Excellent
Very Good
Good
Regular
Bad

 

  Options


 Printer Friendly Printer Friendly

 Send to a Friend Send to a Friend

 

 
 
Associated Topics

Sun Structure
 
 


 
 
"Login" | Login/Create an Account | 0 comments
The comments are owned by the poster. We aren't responsible for their content.
 
 


 
 
No Comments Allowed for Anonymous, please register
 
 


 
  Astronomy & Telescope Astronomy

All logos and trademarks in this site are property of their respective owner. The comments are property of their posters, all the rest © 2004 by Astronomy & Telescope Astronomy
You can syndicate our news using the file backend.php or ultramode.txt