Notices
Results 1 to 7 of 7
Like Tree1Likes
  • 1 Post By Jilan

Thread: expansion of cosmos

  1. #1 expansion of cosmos 
    Junior Member
    Join Date
    Jun 2014
    Posts
    3
    at the extreme point of expansion of the cosmos (universe) is there any chance of a supernova explosion?
    Reply With Quote  
     

  2. #2  
    Senior Member
    Join Date
    Oct 2013
    Location
    UK
    Posts
    997
    A star can go supernova, but depends on the circumstances do the star...see Wiki...

    Supernovae can be triggered in one of two ways: by the sudden reignition of nuclear fusion in a degenerate star; or by the gravitational collapse of the core of a massive star. In the first case, a degenerate white dwarf may accumulate sufficient material from a companion, either through accretion or via a merger, to raise its core temperature, ignite carbon fusion, and trigger runaway nuclear fusion, completely disrupting the star. In the second case, the core of a massive star may undergo sudden gravitational collapse, releasing gravitational potential energy that can create a supernova explosion.

    If you are asking if the whole universe would go supernova, I shouldn't think so.
    subrata likes this.
    Reply With Quote  
     

  3. #3  
    Junior Member
    Join Date
    Jun 2014
    Posts
    3
    Quote Originally Posted by Jilan View Post
    A star can go supernova, but depends on the circumstances do the star...see Wiki...

    Supernovae can be triggered in one of two ways: by the sudden reignition of nuclear fusion in a degenerate star; or by the gravitational collapse of the core of a massive star. In the first case, a degenerate white dwarf may accumulate sufficient material from a companion, either through accretion or via a merger, to raise its core temperature, ignite carbon fusion, and trigger runaway nuclear fusion, completely disrupting the star. In the second case, the core of a massive star may undergo sudden gravitational collapse, releasing gravitational potential energy that can create a supernova explosion.

    If you are asking if the whole universe would go supernova, I shouldn't think so.

    during the expansion of a STAR does the gravitational collapse of that STAR occurs?
    Reply With Quote  
     

  4. #4  
    Senior Member
    Join Date
    Oct 2013
    Location
    UK
    Posts
    997
    I think it means that the centre collapses first causing a runaway reaction which then causes the whole thing to explode.
    Reply With Quote  
     

  5. #5  
    Senior Member
    Join Date
    Jan 2014
    Posts
    748
    subrata: during the expansion of a STAR does the gravitational collapse of that STAR occurs?

    cinci: Think of it this way: A large star runs out of fuel to produce the pressure that supports its size. When this happens, suddenly gravity wins the battle and all the mass of the star implodes. Depending on how big the star is it will form a remnant such as a white dwarf, a neutron star, or a black hole. But all of the material in the star doesn't wind up in the remnant. The in-fall of the star material forms the remnant but it also develops a high pressure; it is this pressure that blows away the part of the star that doesn't wind up in the remnant.
    Reply With Quote  
     

  6. #6  
    Senior Member
    Join Date
    Jun 2014
    Posts
    551
    Quote Originally Posted by subrata
    at the extreme point of expansion of the cosmos (universe) is there any chance of a supernova explosion?
    I don’t understand what the “extreme point of expansion of the cosmos” has to do with supernova explosions. What do you mean by the “extreme point of expansion” anyway?
    Reply With Quote  
     

  7. #7  
    Junior Member
    Join Date
    Jun 2014
    Posts
    3
    By "extreme point of expansion" i mean the expansion of a star at the last stage
    Reply With Quote  
     

Tags for this Thread

View Tag Cloud

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