It doesn&#x27;t work like that.  Yes, a photon travels at 299792458 m&#x2F;s, but photons emitted 13 billion years ago (a redshift of about z=8.6) travel much further than (13<i>10^9 years </i> 3.15<i>10^7 seconds&#x2F;year </i> 299792458 m&#x2F;s) due to the metric expansion of space.<p>The correct calculation involves an integral, an example of which you can see here:<p><a href="http:&#x2F;&#x2F;www.wolframalpha.com&#x2F;widget&#x2F;widgetPopup.jsp?p=v&amp;id=453fadbd8a1a3af50a9df4df899537b5&amp;title=Comoving%20distance%20%28Mpc%29%20from%20redshift%20%28flat%20LCDM%29&amp;theme=red&amp;i0=70.&amp;i1=0.25&amp;i2=8.6&amp;podSelect=&amp;includepodid=Result" rel="nofollow">http:&#x2F;&#x2F;www.wolframalpha.com&#x2F;widget&#x2F;widgetPopup.jsp?p=v&amp;id=45...</a>