<story><title>Why is there a normal galaxy sitting at the edge of the Universe?</title><url>https://www.syfy.com/syfywire/why-is-there-a-normal-galaxy-sitting-at-the-edge-of-the-universe</url></story><parent_chain><item><author>dumpsterdiver</author><text>&amp;gt;&amp;quot;space itself is expanding (into what? nobody knows)&amp;quot;&lt;p&gt;I have a terrifying theory on this (granted, the Earth will be long gone). What if the universe is not actually expanding in the sense that it is being propelled by an initial explosion, but instead falling towards a much greater mass - the end of time so to speak, where all mass ends. Considering that gravity is a &amp;quot;weak force&amp;quot;, the scale of such a mass makes me uncomfortable to think about.&lt;p&gt;Perhaps what we observe as the fabric of space-time itself &amp;quot;stretching&amp;quot; is actually a similar process to what happens to matter as it enters a black hole?</text></item><item><author>zemnmez</author><text>this is because things aren’t ‘moving apart’— space itself is expanding (into what? nobody knows). it’s not that the galaxies are being propelled apart from a force in a particular place either; &lt;i&gt;everything&lt;/i&gt; is expanding away from &lt;i&gt;everything else&lt;/i&gt;.&lt;p&gt;On the traditional balloon model, the surface of the balloon represents space itself. Those dots on the surface of an expanding balloon are not moving relative to space (the surface of the balloon), and so despite the distance increasing between us, the rate of increase of that distance is not bound by the speed of light, which only limits passage &lt;i&gt;through&lt;/i&gt; spacetime.&lt;p&gt;The wikipedia page on redshift describes well how redshift applies to objects which are in space that is expanding: &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Redshift#Expansion_of_space&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Redshift#Expansion_of_space&lt;/a&gt;</text></item><item><author>iwonderwhy</author><text>All right hackernews. Genuine question, not sure where else to ask.&lt;p&gt;If galaxies and stars at the other “end” formed out of matter resulting from the big bang, just as the matter we are made of, how did we get here at the same time that that matter got there?&lt;p&gt;Is it because speeds faster than light are possible, and around the big bang all matter was spread near instantly at that speed? I don&amp;#x27;t understand how matter of the same “kind” was spread throughout the universe all at the same time without traveling at speeds greater than the speed of light. Because if we watch the ”opposite” direction from where the big bang occurred we don&amp;#x27;t really observe matter in a state closer to its original state, or parts of the universe in radically different states - which should result from that matter traveling further than the matter we are made of, as for us to now catchup with light that is “younger” than that towards the core of the universe. Am i missing something?</text></item></parent_chain><comment><author>throwaway568</author><text>Interesting, this adds to a thought I had a couple of weeks ago.&lt;p&gt;We can see the past, but we can’t go there, like an observer inside event horizon looking out, they can see light coming in, but can’t leave.&lt;p&gt;We can’t see the future, but when we are going there, like an observer falling into the event horizon. They can’t see what’s inside, but they can fall inside.&lt;p&gt;As we experience time, it’s like we are falling into a black hole made of time.</text></comment>
<story><title>Why is there a normal galaxy sitting at the edge of the Universe?</title><url>https://www.syfy.com/syfywire/why-is-there-a-normal-galaxy-sitting-at-the-edge-of-the-universe</url></story><parent_chain><item><author>dumpsterdiver</author><text>&amp;gt;&amp;quot;space itself is expanding (into what? nobody knows)&amp;quot;&lt;p&gt;I have a terrifying theory on this (granted, the Earth will be long gone). What if the universe is not actually expanding in the sense that it is being propelled by an initial explosion, but instead falling towards a much greater mass - the end of time so to speak, where all mass ends. Considering that gravity is a &amp;quot;weak force&amp;quot;, the scale of such a mass makes me uncomfortable to think about.&lt;p&gt;Perhaps what we observe as the fabric of space-time itself &amp;quot;stretching&amp;quot; is actually a similar process to what happens to matter as it enters a black hole?</text></item><item><author>zemnmez</author><text>this is because things aren’t ‘moving apart’— space itself is expanding (into what? nobody knows). it’s not that the galaxies are being propelled apart from a force in a particular place either; &lt;i&gt;everything&lt;/i&gt; is expanding away from &lt;i&gt;everything else&lt;/i&gt;.&lt;p&gt;On the traditional balloon model, the surface of the balloon represents space itself. Those dots on the surface of an expanding balloon are not moving relative to space (the surface of the balloon), and so despite the distance increasing between us, the rate of increase of that distance is not bound by the speed of light, which only limits passage &lt;i&gt;through&lt;/i&gt; spacetime.&lt;p&gt;The wikipedia page on redshift describes well how redshift applies to objects which are in space that is expanding: &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Redshift#Expansion_of_space&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Redshift#Expansion_of_space&lt;/a&gt;</text></item><item><author>iwonderwhy</author><text>All right hackernews. Genuine question, not sure where else to ask.&lt;p&gt;If galaxies and stars at the other “end” formed out of matter resulting from the big bang, just as the matter we are made of, how did we get here at the same time that that matter got there?&lt;p&gt;Is it because speeds faster than light are possible, and around the big bang all matter was spread near instantly at that speed? I don&amp;#x27;t understand how matter of the same “kind” was spread throughout the universe all at the same time without traveling at speeds greater than the speed of light. Because if we watch the ”opposite” direction from where the big bang occurred we don&amp;#x27;t really observe matter in a state closer to its original state, or parts of the universe in radically different states - which should result from that matter traveling further than the matter we are made of, as for us to now catchup with light that is “younger” than that towards the core of the universe. Am i missing something?</text></item></parent_chain><comment><author>DeRock</author><text>If you want to delve further into this idea, check out &lt;a href=&quot;http:&amp;#x2F;&amp;#x2F;www.flatuniversesociety.com&quot; rel=&quot;nofollow&quot;&gt;http:&amp;#x2F;&amp;#x2F;www.flatuniversesociety.com&lt;/a&gt;</text></comment>