Notices
Results 1 to 10 of 10

Thread: Why can we see 13 billion year old light sources?

  1. #1 Why can we see 13 billion year old light sources? 
    New Member
    Join Date
    Sep 2007
    Location
    Folkestone, Kent, UK
    Posts
    1
    Why can we detect light that has been travelling the universe for 13 billion years? EG from quasars?
    When that light was first emitted, we (or at least the matter that would eventually form the Earth) were much nearer to the source, in a smaller, less-expanded universe - so surely the light would already have washed over us?


    Reply With Quote  
     

  2.  
     

  3. #2  
    Forum Freshman
    Join Date
    Jun 2007
    Location
    Toledo, OH
    Posts
    68
    who knows


    "Life is what happens to you while you're busy making other plans." - John Lennon
    Reply With Quote  
     

  4. #3 Re: Why can we see 13 billion year old light sources? 
    Forum Junior Lucifer's Avatar
    Join Date
    Jan 2006
    Location
    Close to 290125001
    Posts
    223
    Quote Originally Posted by Andy
    Why can we detect light that has been travelling the universe for 13 billion years? EG from quasars?
    When that light was first emitted, we (or at least the matter that would eventually form the Earth) were much nearer to the source, in a smaller, less-expanded universe - so surely the light would already have washed over us?
    Yet back then we were getting away from each other at nearly the speed of light, too. It has taken long until light has been able to catch up with us.
    “If the misery of the poor be caused not by the laws of nature, but by our institutions, great is our sin.” -Charles Darwin
    Reply With Quote  
     

  5. #4 Re: Why can we see 13 billion year old light sources? 
    Forum Junior SolomonGrundy's Avatar
    Join Date
    Sep 2007
    Location
    USA
    Posts
    232
    Quote Originally Posted by Lucifer
    Quote Originally Posted by Andy
    Why can we detect light that has been travelling the universe for 13 billion years? EG from quasars?
    When that light was first emitted, we (or at least the matter that would eventually form the Earth) were much nearer to the source, in a smaller, less-expanded universe - so surely the light would already have washed over us?
    Yet back then we were getting away from each other at nearly the speed of light, too. It has taken long until light has been able to catch up with us.
    by car or by plane ?
    get real
    We see what the system we live in let us to see the rules are simple and they apply to all
    We are not getting away form nothing we are just in a cycle of the system we live in!
    Ok? or do i have to say it agian?
    Solomon Grundy
    In 1944, this creature rose from the swamp, with tremendous strength and some dormant memories that for example allowed him to speak English, but not knowing what he was, and not remembering Cyrus Gold or his fate. Wandering throughout the swamp, he encountered two escaped criminals, killed them, and took their clothes. When they asked him his name, he simply muttered that he had been born on Monday. Reminded of an old nursery rhyme about a man born on Monday, the thugs named the creature "Solomon Grundy".
    Reply With Quote  
     

  6. #5  
    Universal Mind John Galt's Avatar
    Join Date
    Jul 2005
    Posts
    14,169
    Solomon, please make meaningful contributions to this forum, or make no contributions at all. The choice is yours. Petulant outbursts with zero scientific content do not count as meaningul contributions.
    Thank you.

    Ophiolite - (wearing his moderator hat)
    Reply With Quote  
     

  7. #6 Re: Why can we see 13 billion year old light sources? 
    Forum Junior Lucifer's Avatar
    Join Date
    Jan 2006
    Location
    Close to 290125001
    Posts
    223
    Quote Originally Posted by SolomonGrundy
    Quote Originally Posted by Lucifer
    Quote Originally Posted by Andy
    Why can we detect light that has been travelling the universe for 13 billion years? EG from quasars?
    When that light was first emitted, we (or at least the matter that would eventually form the Earth) were much nearer to the source, in a smaller, less-expanded universe - so surely the light would already have washed over us?
    Yet back then we were getting away from each other at nearly the speed of light, too. It has taken long until light has been able to catch up with us.
    by car or by plane ?
    get real
    We see what the system we live in let us to see the rules are simple and they apply to all
    We are not getting away form nothing we are just in a cycle of the system we live in!
    Ok? or do i have to say it agian?
    The quote above has been declared 100% content free by the Royal Society of Blatantly Vacuous Grandiloquence.
    “If the misery of the poor be caused not by the laws of nature, but by our institutions, great is our sin.” -Charles Darwin
    Reply With Quote  
     

  8. #7  
    Forum Senior miomaz's Avatar
    Join Date
    Oct 2006
    Location
    Germany
    Posts
    302
    hmm... ... ...

    Im not as good in simulating light over a span of 13billion light years away from earth but, isn't light able to be at two positions ath the same time?
    What disturbs me is but another question. If light is absorbed at a position by an object does it dissapear at the other point?
    I haven't come to fight my word, but to find the truth.
    Reply With Quote  
     

  9. #8  
    Administrator KALSTER's Avatar
    Join Date
    Sep 2007
    Location
    South Africa
    Posts
    8,230
    Im not as good in simulating light over a span of 13billion light years away from earth but, isn't light able to be at two positions the the same time?
    are you talking about dislocality? or entanglement? or are they the same?
    Reply With Quote  
     

  10. #9  
    Forum Ph.D.
    Join Date
    Dec 2006
    Location
    Norway
    Posts
    927
    if you'd all spent but a second observing.. it would all become clear.
    myself i spend a lot of time trying to observe how light rebounds around everywhere.
    when you have eliminated the impossible, whatever remains, however improbable, must be the truth
    A.C Doyle
    Reply With Quote  
     

  11. #10 Re: Why can we see 13 billion year old light sources? 
    Forum Freshman
    Join Date
    Sep 2007
    Posts
    28
    Quote Originally Posted by Andy
    Why can we detect light that has been travelling the universe for 13 billion years? EG from quasars?
    When that light was first emitted, we (or at least the matter that would eventually form the Earth) were much nearer to the source, in a smaller, less-expanded universe - so surely the light would already have washed over us?
    The reason we see that deep is because we have a SSU.

    The Spitzer Infrared Telescope has detected redshifts of 7+ and that is because the rest of the tiny structures do not have sufficient light to evaluate their redshifts.

    Mike C
    Reply With Quote  
     

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