Big Bang Question

[mutax2003]

I am just wondering, (1) How far would the point of Big Bang be from Earth (in terms of light years)? How can one go about finding out? (2) I have always wondered if there could've been numerous big bang/big crunch cycles in the past, is there a stated theory for this concept?

 

[mooware]

As I understand it, there is no "point" that would be "x" amount of light years from earth. The big bang pretty much happened everywhere at once, and from everybody's perspective. They are near the center.<br /><br />I don't have any links, but the accepted theory is the Universe will continue to expand, eventually fade out and die. No "recycling". Or the "big rip" scenario<br />

 

[vogon13]

No matter where you go, there you are.<br /><br /> <div class="Discussion_UserSignature"> <p><font color="#ff0000"><strong>TPTB went to Dallas and all I got was Plucked !!</strong></font></p><p><font color="#339966"><strong>So many people, so few recipes !!</strong></font></p><p><font color="#0000ff"><strong>Let's clean up this stinkhole !!</strong></font> </p> </div>

 

[IKEAM]

<p>Several objects seen in deep field observations have been given distances from the Earth approaching that required such that the light travelling from these would have been traversing space for 90% of the age of the universe(since the big bang).</p><p>Does anyone know the combined maximum observed distance from 2 diametrically oposed objects?</p><p>Also, is the theoretical source of the big bang within the observable universe?</p><p>I have also posted this question in another section, sorry for any confusion.</p>

 

[SpeedFreek]

<p>Hi there and welcome to SDC! (space.com)&nbsp;</p><p>Before I start to answer your questions (which are a lot more complicated than they might seem), I would recommend you have a look at the link below:</p><p>The Distance Scale of the Universe&nbsp;</p><p>and then read this pdf document:</p><p>Misconceptions about the Big-Bang.</p><p>Have a look at those and see what you think!&nbsp; <img src="http://sitelife.space.com/ver1.0/content/scripts/tinymce/plugins/emotions/images/smiley-smile.gif" border="0" alt="Smile" title="Smile" /> </p> <div class="Discussion_UserSignature"> <p><font color="#ff0000">_______________________________________________<br /></font><font size="2"><em>SpeedFreek</em></font> </p> </div>

 

[IKEAM]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Hi there and welcome to SDC! (space.com)&nbsp;Before I start to answer your questions (which are a lot more complicated than they might seem), I would recommend you have a look at the link below:The Distance Scale of the Universe&nbsp;and then read this pdf document:Misconceptions about the Big-Bang.Have a look at those and see what you think!&nbsp; <br />Posted by SpeedFreek</DIV><br /><br />Hello</p><p>Thanks for the reply.&nbsp; I will read the items you list and come back.</p>

 

[SpeedFreek]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>HelloThanks for the reply.&nbsp; I will read the items you list and come back. <br /> Posted by IKEAM</DIV></p><p>I just realised I might have sounded like I was setting you homework or something... <img src="http://sitelife.space.com/ver1.0/content/scripts/tinymce/plugins/emotions/images/smiley-wink.gif" border="0" alt="Wink" title="Wink" /></p><p>It is just that in order to answer your questions properly there are quite a few concepts to explain, and those links will explain the concepts far better than I could in a post here. I'm sure you will have <em>even more</em> questions when you come back! </p><p>&nbsp;</p> <div class="Discussion_UserSignature"> <p><font color="#ff0000">_______________________________________________<br /></font><font size="2"><em>SpeedFreek</em></font> </p> </div>

 

[IKEAM]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>I just realised I might have sounded like I was setting you homework or something... It is just that in order to answer your questions properly there are quite a few concepts to explain, and those links will explain the concepts far better than I could in a post here. I'm sure you will have even more questions when you come back! &nbsp; <br />Posted by SpeedFreek</DIV></p><p>Hello</p><p>Our discussion seems to have disappeared from the other section, any ideas?</p>

 

[SpeedFreek]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>HelloOur discussion seems to have disappeared from the other section, any ideas? <br /> Posted by IKEAM</DIV></p><p>It seems like the moderators may have removed one of the threads, and they picked the one with the more recent discussion in it. I will ask if it can be reinstated, or combined with this one.&nbsp;</p> <div class="Discussion_UserSignature"> <p><font color="#ff0000">_______________________________________________<br /></font><font size="2"><em>SpeedFreek</em></font> </p> </div>

 

[IKEAM]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>It seems like the moderators may have removed one of the threads, and they picked the one with the more recent discussion in it. I will ask if it can be reinstated, or combined with this one.&nbsp; <br />Posted by SpeedFreek</DIV></p><p>Why would they do this, is there a problem with the content or the format of the discussion, I'm amazed.</p><p>Could you tell me how to contact them so I can ask their reason.<br /></p>

 

[SpeedFreek]

The reason must be that there were two threads with identical topics and first posts in different forums, which is against the rules, so I guess one of them had to go, but let's see if we can get the one with the actual discussion in SS&A reinstated and let this one be the one that gets deleted. <div class="Discussion_UserSignature"> <p><font color="#ff0000">_______________________________________________<br /></font><font size="2"><em>SpeedFreek</em></font> </p> </div>

 

[SpeedFreek]

<p>Well, it seems that they deleted the wrong thread (Doh!!) and cannot restore it, so we are now stuck with this one...&nbsp; in future, if you post a message and then realise it is in the wrong forum it is better to wait for (or ask) a moderator to move it. But that doesn't help us with all the discussion we lost... sorry about that.</p><p>The second link above does hold the answer to why the origin point of the universe is not inside the universe - basically, the whole thing expanded so the origin point became the whole thing. Everything in the observable universe was there at the origin, and anywhere in the universe can think of themselves as the origin point due to the way that the universe expands. If you have questions about this, feel free to ask! </p><p>As for your distances question, the first link explains the different distance measures used, and the various options are shown below:</p><p><u>Light-travel time:</u></p><p>The most distant galaxy we have detected (which has a redshift of z=7) is 12.9 billion light years away, so two z=7 galaxies in opposite directions are 25.8 billion light years apart in terms of how long light has had to travel. Both of those galaxies can see us, or I should say they can see what was going on here 12.9 billion years ago, but they cannot see each other.</p><p>&nbsp;</p><p><u>Co-moving distance:</u>&nbsp;</p><p>Those z=7 galaxies are estimated to have receded to around 29 billion light years away by now, meaning that they would be 58 billion light years apart today. They have only had 13.7 billion years to reach that distance, but the expansion of space was a lot quicker in the past than it is nowadays and the limit of the speed of light only applies to objects moving through the universe, not to the expansion of the universe itself. We can see galaxies that are now, and always have been, receding faster than light.</p><p>I will leave out the angular-diameter distance this time, as I now know this is not what you were referring to in your original question, but feel free to ask any questions you like!</p><p><img src="http://sitelife.space.com/ver1.0/content/scripts/tinymce/plugins/emotions/images/smiley-smile.gif" border="0" alt="Smile" title="Smile" /> </p> <div class="Discussion_UserSignature"> <p><font color="#ff0000">_______________________________________________<br /></font><font size="2"><em>SpeedFreek</em></font> </p> </div>

 

[MeteorWayne]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Why would they do this, is there a problem with the content or the format of the discussion, I'm amazed.Could you tell me how to contact them so I can ask their reason. <br />Posted by IKEAM</DIV><br /><br />The reason is that you are not permitted to post identical threads in two different fora. Pick one or the other. When you post duplicate threads, one of them is going to disappear. While we do are best to pick the best one to delete, if you hadn't violated the rules by posting duplicate threads in two places, it never would have come up. While AFAIK, I'm not the one who did it, it never would have come up had you not posted duplicate threads.</p><p>If this didn't work out well, the moderator team is sorry; it was an accident.</p> <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>

 

[weeman]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Also, is the theoretical source of the big bang within the observable universe?<br />Posted by IKEAM</DIV><br /><br />Are you asking if we can observe the theoretical source? </p><p>The big bang was an expansion of space; so basically, the big bang happened everywhere. Since every point of space expands away from every other point of space, it means that every point of space&nbsp;is where the big bang happened. &nbsp;</p> <div class="Discussion_UserSignature"> <p> </p><p><strong><font color="#ff0000">Techies: We do it in the dark. </font></strong></p><p><font color="#0000ff"><strong>"Put your hand on a stove for a minute and it seems like an hour. Sit with that special girl for an hour and it seems like a minute. That's relativity.</strong><strong>" -Albert Einstein </strong></font></p> </div>

 

[josh_ibanez77]

<p>http://www.newscientist.com/article/mg20126911.300-our-world-may-be-a-giant-hologram.html?page=3</p><p>yall should read this what if the&nbsp; every thing we saw was a holagram for say</p>