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<p>[QUOTE=&quot;-jeffB, post: 4904911, member: 27832&quot;]Gravitational lensing. If there&#039;s a massive object between us and the distant galaxy, it bends the light coming from that galaxy, and we see the distant galaxy &quot;smeared&quot; along an arc. If things are positioned correctly, we see multiple images of the distant galaxy.</p><p><br /></p><p>In principle, if light bent along one path has to travel a longer distance than light bent along another path, we&#039;d see two images of the distant galaxy <i>from two different times</i>. I don&#039;t know whether there are any gravitational lenses arranged in such a way as to make this happen. You&#039;d almost need a convenient supernova in the distant galaxy to check for it, and even then it might be difficult.[/QUOTE]</p><p><br /></p>

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