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"Everywhere we look now, we see them."

It is critical to remember that the events we see with our telescopes happened a very long time ago. Light from the Andromeda galaxy takes 2.5 million years to reach us, and that galaxy is in the "neighborhood", so to speak. The further out you go, the further back you go. What's happening right now, in a galaxy a billion light-years from now? We won't know for another billion years.

There's an interesting article in SciAm this month - I'll send you a link when it goes online as the website is a month behind the print edition - which notes that the frequency of galactic collisions peaked between 6 and 8 billion years ago, and has been declining ever since.

Elaine Meinel Supkis

That will be interesting to see...only it does not explain the huge groupings of millions of galaxies, flowing towards something! Not at all.

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