nullus Posted November 23, 2014 Share Posted November 23, 2014 No. He was there 1 million years ago. He is probably long dead (depending on the lifespan of these aliens). What he sees is the Earth as it was 2 million years ago. hello. sorry about this question here, but so which direction we have to look to see the moment of BB of our universe? Link to comment Share on other sites More sharing options...
Strange Posted November 23, 2014 Share Posted November 23, 2014 (edited) hello. sorry about this question here, but so which direction we have to look to see the moment of BB of our universe? Any direction (the big bang happened - and is still happening - everywhere). The earliest we can see is 360,000 years after the big bang when the density of the universe decreased enough to let photons travel across space. This is what we now see as the cosmic microwave background. Edited November 23, 2014 by Strange Link to comment Share on other sites More sharing options...
Nicholas Kang Posted November 23, 2014 Share Posted November 23, 2014 The earliest we can see is 360,000 years after the big bang... It is 380,000 years. (a typing error?) Link to comment Share on other sites More sharing options...
Strange Posted November 23, 2014 Share Posted November 23, 2014 It is 380,000 years. (a typing error?) Or bad memory! Link to comment Share on other sites More sharing options...
Nicholas Kang Posted November 23, 2014 Share Posted November 23, 2014 The universe is still expanding (and accelerating). Since the universe is borned 13.7 billion years ago, the furthest point we can see must be 13.7 billion light years away. But since space is expanding, the proper distance would be about 47 billion light years away. 1 Link to comment Share on other sites More sharing options...
John Cuthber Posted November 23, 2014 Share Posted November 23, 2014 It is 380,000 years. (a typing error?) Why do you ask? This site says it's about twice that http://hyperphysics.phy-astr.gsu.edu/hbase/astro/astref.html but it's not an easy thing to estimate. 1 Link to comment Share on other sites More sharing options...
michel123456 Posted November 23, 2014 Share Posted November 23, 2014 The BB happened (also) here. Link to comment Share on other sites More sharing options...
nullus Posted November 23, 2014 Author Share Posted November 23, 2014 Any direction (the big bang happened - and is still happening - everywhere). The earliest we can see is 360,000 years after the big bang when the density of the universe decreased enough to let photons travel across space. This is what we now see as the cosmic microwave background. yes, that's correct, thank you. but I mean the moment of explosion , isn't was supposed to be the blink of light ( if i can say so ) exactly in a moment, i mean something like nuclear explosion first light after what has happened.. can you explain me this? I not really understand it... Link to comment Share on other sites More sharing options...
Strange Posted November 23, 2014 Share Posted November 23, 2014 yes, that's correct, thank you. but I mean the moment of explosion , isn't was supposed to be the blink of light ( if i can say so ) exactly in a moment, i mean something like nuclear explosion first light after what has happened.. can you explain me this? I not really understand it... Well, it is misleading to think of it like an explosion. Again, the big bang happened everywhere. Perhaps the easiest way to visualise it is to "wind the clock back" so that all the galaxies get closer and closer together. Eventually they are all in the same place - so the big bang happened where every galaxy is (i.e. everywhere). Link to comment Share on other sites More sharing options...
nullus Posted November 23, 2014 Author Share Posted November 23, 2014 Well, it is misleading to think of it like an explosion. Again, the big bang happened everywhere. Perhaps the easiest way to visualise it is to "wind the clock back" so that all the galaxies get closer and closer together. Eventually they are all in the same place - so the big bang happened where every galaxy is (i.e. everywhere). no.. it is supposed to be better explanation for that, for me it is not enough only this, thanks anyway. Link to comment Share on other sites More sharing options...
DimaMazin Posted November 24, 2014 Share Posted November 24, 2014 no.. it is supposed to be better explanation for that, for me it is not enough only this, thanks anyway. We are surrounded by past of big bang, though space of big bang was so small. Link to comment Share on other sites More sharing options...
nullus Posted November 24, 2014 Author Share Posted November 24, 2014 We are surrounded by past of big bang, though space of big bang was so small. yes, maybe I was supposed to say that I'm happy with yours answers. probably I'm burn some processors to lift up this question here.. Link to comment Share on other sites More sharing options...
swansont Posted November 27, 2014 Share Posted November 27, 2014 ! Moderator Note Off-topic question about the ether and followups have been split http://www.scienceforums.net/topic/86673-big-bag-and-ether-split-from-direction-of-the-big-bang/ Link to comment Share on other sites More sharing options...
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